diff --git a/.idea/TijdVoorDeTest.iml b/.idea/TijdVoorDeTest.iml
index cd08072..3d04ddc 100644
--- a/.idea/TijdVoorDeTest.iml
+++ b/.idea/TijdVoorDeTest.iml
@@ -153,6 +153,12 @@
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/css-selector" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/phpunit-bridge" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/serializer" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/maennchen/zipstream-php" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/markbaker/complex" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/markbaker/matrix" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/phpoffice/phpspreadsheet" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/psr/http-client" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/psr/simple-cache" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index 332b63f..5b777b1 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -70,6 +70,64 @@
       <option name="migratedIntoUserSpace" value="true" />
     </inspection_tool>
     <inspection_tool class="PhpCSFixerValidationInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="PhpFullyQualifiedNameUsageInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true">
+      <option name="IGNORE_GLOBAL_NAMESPACE" value="true" />
+    </inspection_tool>
     <inspection_tool class="PhpStanGlobal" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="SecurityAdvisoriesInspection" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="optionConfiguration">
+        <list>
+          <option value="barryvdh/laravel-debugbar" />
+          <option value="behat/behat" />
+          <option value="brianium/paratest" />
+          <option value="codeception/codeception" />
+          <option value="codedungeon/phpunit-result-printer" />
+          <option value="composer/composer" />
+          <option value="doctrine/coding-standard" />
+          <option value="filp/whoops" />
+          <option value="friendsofphp/php-cs-fixer" />
+          <option value="humbug/humbug" />
+          <option value="infection/infection" />
+          <option value="jakub-onderka/php-parallel-lint" />
+          <option value="johnkary/phpunit-speedtrap" />
+          <option value="kalessil/production-dependencies-guard" />
+          <option value="mikey179/vfsStream" />
+          <option value="mockery/mockery" />
+          <option value="mybuilder/phpunit-accelerator" />
+          <option value="orchestra/testbench" />
+          <option value="pdepend/pdepend" />
+          <option value="phan/phan" />
+          <option value="phing/phing" />
+          <option value="phpcompatibility/php-compatibility" />
+          <option value="phpmd/phpmd" />
+          <option value="phpro/grumphp" />
+          <option value="phpspec/phpspec" />
+          <option value="phpspec/prophecy" />
+          <option value="phpstan/phpstan" />
+          <option value="phpunit/phpunit" />
+          <option value="povils/phpmnd" />
+          <option value="roave/security-advisories" />
+          <option value="satooshi/php-coveralls" />
+          <option value="sebastian/phpcpd" />
+          <option value="slevomat/coding-standard" />
+          <option value="spatie/phpunit-watcher" />
+          <option value="squizlabs/php_codesniffer" />
+          <option value="sstalle/php7cc" />
+          <option value="symfony/debug" />
+          <option value="symfony/maker-bundle" />
+          <option value="symfony/phpunit-bridge" />
+          <option value="symfony/var-dumper" />
+          <option value="vimeo/psalm" />
+          <option value="wimg/php-compatibility" />
+          <option value="wp-coding-standards/wpcs" />
+          <option value="yiisoft/yii2-coding-standards" />
+          <option value="yiisoft/yii2-debug" />
+          <option value="yiisoft/yii2-gii" />
+          <option value="zendframework/zend-coding-standard" />
+          <option value="zendframework/zend-debug" />
+          <option value="zendframework/zend-test" />
+        </list>
+      </option>
+    </inspection_tool>
   </profile>
 </component>
\ No newline at end of file
diff --git a/.idea/php.xml b/.idea/php.xml
index 36b158b..19ac489 100644
--- a/.idea/php.xml
+++ b/.idea/php.xml
@@ -1,10 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="MessDetectorOptionsConfiguration">
+    <option name="transferred" value="true" />
+  </component>
   <component name="PHPCSFixerOptionsConfiguration">
     <option name="codingStandard" value="Custom" />
     <option name="rulesetPath" value=".php-cs-fixer.dist.php" />
     <option name="transferred" value="true" />
   </component>
+  <component name="PHPCodeSnifferOptionsConfiguration">
+    <option name="highlightLevel" value="WARNING" />
+    <option name="transferred" value="true" />
+  </component>
   <component name="PhpCSFixer">
     <phpcsfixer_settings>
       <phpcs_fixer_by_interpreter interpreter_id="96512cb2-7b9e-4e1d-bfa2-bf7f3be424c8" standards="DoctrineAnnotation;PER;PER-CS;PER-CS1.0;PER-CS2.0;PHP54Migration;PHP56Migration;PHP70Migration;PHP71Migration;PHP73Migration;PHP74Migration;PHP80Migration;PHP81Migration;PHP82Migration;PHP83Migration;PHP84Migration;PHPUnit100Migration;PHPUnit30Migration;PHPUnit32Migration;PHPUnit35Migration;PHPUnit43Migration;PHPUnit48Migration;PHPUnit50Migration;PHPUnit52Migration;PHPUnit54Migration;PHPUnit55Migration;PHPUnit56Migration;PHPUnit57Migration;PHPUnit60Migration;PHPUnit75Migration;PHPUnit84Migration;PHPUnit91Migration;PSR1;PSR12;PSR2;PhpCsFixer;Symfony" tool_path="vendor/bin/php-cs-fixer" timeout="30000" />
@@ -24,7 +31,6 @@
     <include_path>
       <path value="$PROJECT_DIR$/vendor/symfony/service-contracts" />
       <path value="$PROJECT_DIR$/vendor/symfony/string" />
-      <path value="$PROJECT_DIR$/vendor/symfony/yaml" />
       <path value="$PROJECT_DIR$/vendor/symfony/dotenv" />
       <path value="$PROJECT_DIR$/vendor/runtime/frankenphp-symfony" />
       <path value="$PROJECT_DIR$/vendor/composer" />
@@ -169,6 +175,13 @@
       <path value="$PROJECT_DIR$/vendor/phpdocumentor/type-resolver" />
       <path value="$PROJECT_DIR$/vendor/phpdocumentor/reflection-docblock" />
       <path value="$PROJECT_DIR$/vendor/phpstan/phpdoc-parser" />
+      <path value="$PROJECT_DIR$/vendor/markbaker/complex" />
+      <path value="$PROJECT_DIR$/vendor/markbaker/matrix" />
+      <path value="$PROJECT_DIR$/vendor/phpoffice/phpspreadsheet" />
+      <path value="$PROJECT_DIR$/vendor/psr/http-client" />
+      <path value="$PROJECT_DIR$/vendor/psr/simple-cache" />
+      <path value="$PROJECT_DIR$/vendor/maennchen/zipstream-php" />
+      <path value="$PROJECT_DIR$/vendor/symfony/yaml" />
     </include_path>
   </component>
   <component name="PhpInterpreters">
@@ -267,4 +280,7 @@
       <psalm_fixer_by_interpreter asDefaultInterpreter="true" interpreter_id="96512cb2-7b9e-4e1d-bfa2-bf7f3be424c8" timeout="60000" />
     </Psalm_settings>
   </component>
+  <component name="PsalmOptionsConfiguration">
+    <option name="transferred" value="true" />
+  </component>
 </project>
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index c224436..59d7e4f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -32,6 +32,7 @@ RUN set -eux; \
 		opcache \
 		zip \
 		uuid \
+		gd \
 	;
 
 # https://getcomposer.org/doc/03-cli.md#composer-allow-superuser
diff --git a/Justfile b/Justfile
index 0c8c506..619a258 100644
--- a/Justfile
+++ b/Justfile
@@ -14,6 +14,8 @@ exec *args:
 shell:
     @docker compose exec php bash
 
+bash: shell
+
 migrate: up
     docker compose run --rm php bin/console doctrine:migrations:migrate --no-interaction
 
diff --git a/composer.json b/composer.json
index ea9ca18..0a01d1d 100644
--- a/composer.json
+++ b/composer.json
@@ -15,6 +15,7 @@
         "doctrine/orm": "^3.3.2",
         "easycorp/easyadmin-bundle": "^4.24.6",
         "phpdocumentor/reflection-docblock": "^5.6",
+        "phpoffice/phpspreadsheet": "*",
         "phpstan/phpdoc-parser": "^2.1",
         "runtime/frankenphp-symfony": "^0.2.0",
         "sentry/sentry-symfony": "^5.2",
diff --git a/composer.lock b/composer.lock
index 8e80612..3fc64ec 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,87 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "b9d67a608b55f14f7d16d1407d13fb3e",
+    "content-hash": "eeae1ea54653efd8d35df74995953ea0",
     "packages": [
+        {
+            "name": "composer/pcre",
+            "version": "3.3.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/pcre.git",
+                "reference": "b2bed4734f0cc156ee1fe9c0da2550420d99a21e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/pcre/zipball/b2bed4734f0cc156ee1fe9c0da2550420d99a21e",
+                "reference": "b2bed4734f0cc156ee1fe9c0da2550420d99a21e",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.4 || ^8.0"
+            },
+            "conflict": {
+                "phpstan/phpstan": "<1.11.10"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.12 || ^2",
+                "phpstan/phpstan-strict-rules": "^1 || ^2",
+                "phpunit/phpunit": "^8 || ^9"
+            },
+            "type": "library",
+            "extra": {
+                "phpstan": {
+                    "includes": [
+                        "extension.neon"
+                    ]
+                },
+                "branch-alias": {
+                    "dev-main": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Composer\\Pcre\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be",
+                    "homepage": "http://seld.be"
+                }
+            ],
+            "description": "PCRE wrapping library that offers type-safe preg_* replacements.",
+            "keywords": [
+                "PCRE",
+                "preg",
+                "regex",
+                "regular expression"
+            ],
+            "support": {
+                "issues": "https://github.com/composer/pcre/issues",
+                "source": "https://github.com/composer/pcre/tree/3.3.2"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2024-11-12T16:29:46+00:00"
+        },
         {
             "name": "doctrine/collections",
             "version": "2.3.0",
@@ -1471,6 +1550,191 @@
             },
             "time": "2025-03-19T14:43:43+00:00"
         },
+        {
+            "name": "maennchen/zipstream-php",
+            "version": "3.1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/maennchen/ZipStream-PHP.git",
+                "reference": "aeadcf5c412332eb426c0f9b4485f6accba2a99f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/maennchen/ZipStream-PHP/zipball/aeadcf5c412332eb426c0f9b4485f6accba2a99f",
+                "reference": "aeadcf5c412332eb426c0f9b4485f6accba2a99f",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "ext-zlib": "*",
+                "php-64bit": "^8.2"
+            },
+            "require-dev": {
+                "brianium/paratest": "^7.7",
+                "ext-zip": "*",
+                "friendsofphp/php-cs-fixer": "^3.16",
+                "guzzlehttp/guzzle": "^7.5",
+                "mikey179/vfsstream": "^1.6",
+                "php-coveralls/php-coveralls": "^2.5",
+                "phpunit/phpunit": "^11.0",
+                "vimeo/psalm": "^6.0"
+            },
+            "suggest": {
+                "guzzlehttp/psr7": "^2.4",
+                "psr/http-message": "^2.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "ZipStream\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Paul Duncan",
+                    "email": "pabs@pablotron.org"
+                },
+                {
+                    "name": "Jonatan Männchen",
+                    "email": "jonatan@maennchen.ch"
+                },
+                {
+                    "name": "Jesse Donat",
+                    "email": "donatj@gmail.com"
+                },
+                {
+                    "name": "András Kolesár",
+                    "email": "kolesar@kolesar.hu"
+                }
+            ],
+            "description": "ZipStream is a library for dynamically streaming dynamic zip files from PHP without writing to the disk at all on the server.",
+            "keywords": [
+                "stream",
+                "zip"
+            ],
+            "support": {
+                "issues": "https://github.com/maennchen/ZipStream-PHP/issues",
+                "source": "https://github.com/maennchen/ZipStream-PHP/tree/3.1.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/maennchen",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-01-27T12:07:53+00:00"
+        },
+        {
+            "name": "markbaker/complex",
+            "version": "3.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/MarkBaker/PHPComplex.git",
+                "reference": "95c56caa1cf5c766ad6d65b6344b807c1e8405b9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/MarkBaker/PHPComplex/zipball/95c56caa1cf5c766ad6d65b6344b807c1e8405b9",
+                "reference": "95c56caa1cf5c766ad6d65b6344b807c1e8405b9",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2 || ^8.0"
+            },
+            "require-dev": {
+                "dealerdirect/phpcodesniffer-composer-installer": "dev-master",
+                "phpcompatibility/php-compatibility": "^9.3",
+                "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0",
+                "squizlabs/php_codesniffer": "^3.7"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Complex\\": "classes/src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mark Baker",
+                    "email": "mark@lange.demon.co.uk"
+                }
+            ],
+            "description": "PHP Class for working with complex numbers",
+            "homepage": "https://github.com/MarkBaker/PHPComplex",
+            "keywords": [
+                "complex",
+                "mathematics"
+            ],
+            "support": {
+                "issues": "https://github.com/MarkBaker/PHPComplex/issues",
+                "source": "https://github.com/MarkBaker/PHPComplex/tree/3.0.2"
+            },
+            "time": "2022-12-06T16:21:08+00:00"
+        },
+        {
+            "name": "markbaker/matrix",
+            "version": "3.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/MarkBaker/PHPMatrix.git",
+                "reference": "728434227fe21be27ff6d86621a1b13107a2562c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/MarkBaker/PHPMatrix/zipball/728434227fe21be27ff6d86621a1b13107a2562c",
+                "reference": "728434227fe21be27ff6d86621a1b13107a2562c",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1 || ^8.0"
+            },
+            "require-dev": {
+                "dealerdirect/phpcodesniffer-composer-installer": "dev-master",
+                "phpcompatibility/php-compatibility": "^9.3",
+                "phpdocumentor/phpdocumentor": "2.*",
+                "phploc/phploc": "^4.0",
+                "phpmd/phpmd": "2.*",
+                "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0",
+                "sebastian/phpcpd": "^4.0",
+                "squizlabs/php_codesniffer": "^3.7"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Matrix\\": "classes/src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mark Baker",
+                    "email": "mark@demon-angel.eu"
+                }
+            ],
+            "description": "PHP Class for working with matrices",
+            "homepage": "https://github.com/MarkBaker/PHPMatrix",
+            "keywords": [
+                "mathematics",
+                "matrix",
+                "vector"
+            ],
+            "support": {
+                "issues": "https://github.com/MarkBaker/PHPMatrix/issues",
+                "source": "https://github.com/MarkBaker/PHPMatrix/tree/3.0.1"
+            },
+            "time": "2022-12-02T22:17:43+00:00"
+        },
         {
             "name": "phpdocumentor/reflection-common",
             "version": "2.2.0",
@@ -1646,6 +1910,112 @@
             },
             "time": "2024-11-09T15:12:26+00:00"
         },
+        {
+            "name": "phpoffice/phpspreadsheet",
+            "version": "4.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/PHPOffice/PhpSpreadsheet.git",
+                "reference": "5f6d7410e5fd72cac1aa67d4f05f4fe664d01ba6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/PHPOffice/PhpSpreadsheet/zipball/5f6d7410e5fd72cac1aa67d4f05f4fe664d01ba6",
+                "reference": "5f6d7410e5fd72cac1aa67d4f05f4fe664d01ba6",
+                "shasum": ""
+            },
+            "require": {
+                "composer/pcre": "^1||^2||^3",
+                "ext-ctype": "*",
+                "ext-dom": "*",
+                "ext-fileinfo": "*",
+                "ext-gd": "*",
+                "ext-iconv": "*",
+                "ext-libxml": "*",
+                "ext-mbstring": "*",
+                "ext-simplexml": "*",
+                "ext-xml": "*",
+                "ext-xmlreader": "*",
+                "ext-xmlwriter": "*",
+                "ext-zip": "*",
+                "ext-zlib": "*",
+                "maennchen/zipstream-php": "^2.1 || ^3.0",
+                "markbaker/complex": "^3.0",
+                "markbaker/matrix": "^3.0",
+                "php": "^8.1",
+                "psr/http-client": "^1.0",
+                "psr/http-factory": "^1.0",
+                "psr/simple-cache": "^1.0 || ^2.0 || ^3.0"
+            },
+            "require-dev": {
+                "dealerdirect/phpcodesniffer-composer-installer": "dev-main",
+                "dompdf/dompdf": "^2.0 || ^3.0",
+                "friendsofphp/php-cs-fixer": "^3.2",
+                "mitoteam/jpgraph": "^10.3",
+                "mpdf/mpdf": "^8.1.1",
+                "phpcompatibility/php-compatibility": "^9.3",
+                "phpstan/phpstan": "^1.1 || ^2.0",
+                "phpstan/phpstan-deprecation-rules": "^1.0 || ^2.0",
+                "phpstan/phpstan-phpunit": "^1.0 || ^2.0",
+                "phpunit/phpunit": "^10.5",
+                "squizlabs/php_codesniffer": "^3.7",
+                "tecnickcom/tcpdf": "^6.5"
+            },
+            "suggest": {
+                "dompdf/dompdf": "Option for rendering PDF with PDF Writer",
+                "ext-intl": "PHP Internationalization Functions",
+                "mitoteam/jpgraph": "Option for rendering charts, or including charts with PDF or HTML Writers",
+                "mpdf/mpdf": "Option for rendering PDF with PDF Writer",
+                "tecnickcom/tcpdf": "Option for rendering PDF with PDF Writer"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "PhpOffice\\PhpSpreadsheet\\": "src/PhpSpreadsheet"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Maarten Balliauw",
+                    "homepage": "https://blog.maartenballiauw.be"
+                },
+                {
+                    "name": "Mark Baker",
+                    "homepage": "https://markbakeruk.net"
+                },
+                {
+                    "name": "Franck Lefevre",
+                    "homepage": "https://rootslabs.net"
+                },
+                {
+                    "name": "Erik Tilt"
+                },
+                {
+                    "name": "Adrien Crivelli"
+                }
+            ],
+            "description": "PHPSpreadsheet - Read, Create and Write Spreadsheet documents in PHP - Spreadsheet engine",
+            "homepage": "https://github.com/PHPOffice/PhpSpreadsheet",
+            "keywords": [
+                "OpenXML",
+                "excel",
+                "gnumeric",
+                "ods",
+                "php",
+                "spreadsheet",
+                "xls",
+                "xlsx"
+            ],
+            "support": {
+                "issues": "https://github.com/PHPOffice/PhpSpreadsheet/issues",
+                "source": "https://github.com/PHPOffice/PhpSpreadsheet/tree/4.2.0"
+            },
+            "time": "2025-04-17T02:41:45+00:00"
+        },
         {
             "name": "phpstan/phpdoc-parser",
             "version": "2.1.0",
@@ -1893,6 +2263,58 @@
             },
             "time": "2019-01-08T18:20:26+00:00"
         },
+        {
+            "name": "psr/http-client",
+            "version": "1.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-client.git",
+                "reference": "bb5906edc1c324c9a05aa0873d40117941e5fa90"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-client/zipball/bb5906edc1c324c9a05aa0873d40117941e5fa90",
+                "reference": "bb5906edc1c324c9a05aa0873d40117941e5fa90",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0 || ^8.0",
+                "psr/http-message": "^1.0 || ^2.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Client\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP clients",
+            "homepage": "https://github.com/php-fig/http-client",
+            "keywords": [
+                "http",
+                "http-client",
+                "psr",
+                "psr-18"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/http-client"
+            },
+            "time": "2023-09-23T14:17:50+00:00"
+        },
         {
             "name": "psr/http-factory",
             "version": "1.1.0",
@@ -2051,6 +2473,57 @@
             },
             "time": "2024-09-11T13:17:53+00:00"
         },
+        {
+            "name": "psr/simple-cache",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/simple-cache.git",
+                "reference": "764e0b3939f5ca87cb904f570ef9be2d78a07865"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/simple-cache/zipball/764e0b3939f5ca87cb904f570ef9be2d78a07865",
+                "reference": "764e0b3939f5ca87cb904f570ef9be2d78a07865",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.0.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\SimpleCache\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interfaces for simple caching",
+            "keywords": [
+                "cache",
+                "caching",
+                "psr",
+                "psr-16",
+                "simple-cache"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/simple-cache/tree/3.0.0"
+            },
+            "time": "2021-10-29T13:26:27+00:00"
+        },
         {
             "name": "ralouphie/getallheaders",
             "version": "3.0.3",
@@ -7354,85 +7827,6 @@
             ],
             "time": "2022-12-23T10:58:28+00:00"
         },
-        {
-            "name": "composer/pcre",
-            "version": "3.3.2",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/composer/pcre.git",
-                "reference": "b2bed4734f0cc156ee1fe9c0da2550420d99a21e"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/composer/pcre/zipball/b2bed4734f0cc156ee1fe9c0da2550420d99a21e",
-                "reference": "b2bed4734f0cc156ee1fe9c0da2550420d99a21e",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.4 || ^8.0"
-            },
-            "conflict": {
-                "phpstan/phpstan": "<1.11.10"
-            },
-            "require-dev": {
-                "phpstan/phpstan": "^1.12 || ^2",
-                "phpstan/phpstan-strict-rules": "^1 || ^2",
-                "phpunit/phpunit": "^8 || ^9"
-            },
-            "type": "library",
-            "extra": {
-                "phpstan": {
-                    "includes": [
-                        "extension.neon"
-                    ]
-                },
-                "branch-alias": {
-                    "dev-main": "3.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Composer\\Pcre\\": "src"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Jordi Boggiano",
-                    "email": "j.boggiano@seld.be",
-                    "homepage": "http://seld.be"
-                }
-            ],
-            "description": "PCRE wrapping library that offers type-safe preg_* replacements.",
-            "keywords": [
-                "PCRE",
-                "preg",
-                "regex",
-                "regular expression"
-            ],
-            "support": {
-                "issues": "https://github.com/composer/pcre/issues",
-                "source": "https://github.com/composer/pcre/tree/3.3.2"
-            },
-            "funding": [
-                {
-                    "url": "https://packagist.com",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/composer",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2024-11-12T16:29:46+00:00"
-        },
         {
             "name": "composer/semver",
             "version": "3.4.3",
diff --git a/migrations/Version20250427174822.php b/migrations/Version20250427174822.php
new file mode 100644
index 0000000..94eef38
--- /dev/null
+++ b/migrations/Version20250427174822.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20250427174822 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add ordering to question and answer';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql(<<<'SQL'
+            ALTER TABLE answer ADD ordering SMALLINT DEFAULT 0 NOT NULL
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE question ADD ordering SMALLINT DEFAULT 0 NOT NULL
+        SQL);
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql(<<<'SQL'
+            ALTER TABLE answer DROP ordering
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE question DROP ordering
+        SQL);
+    }
+}
diff --git a/rector.php b/rector.php
index 90975a8..a6575ac 100644
--- a/rector.php
+++ b/rector.php
@@ -11,6 +11,8 @@ return RectorConfig::configure()
         __DIR__.'/src',
         __DIR__.'/tests',
     ])
+    ->withSymfonyContainerXml('var/cache/dev/App_KernelDevDebugContainer.xml')
+    ->withParallel()
     ->withPhpSets()
     ->withPreparedSets(
         deadCode: true,
diff --git a/src/Controller/BackofficeController.php b/src/Controller/BackofficeController.php
index ac611d4..a85e656 100644
--- a/src/Controller/BackofficeController.php
+++ b/src/Controller/BackofficeController.php
@@ -4,19 +4,28 @@ declare(strict_types=1);
 
 namespace App\Controller;
 
+use App\Entity\Candidate;
 use App\Entity\Quiz;
 use App\Entity\Season;
 use App\Entity\User;
+use App\Enum\FlashType;
+use App\Form\AddCandidatesFormType;
+use App\Form\CreateSeasonFormType;
+use App\Form\UploadQuizFormType;
 use App\Repository\CandidateRepository;
 use App\Repository\SeasonRepository;
 use App\Security\Voter\SeasonVoter;
+use App\Service\QuizSpreadsheetService;
 use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpFoundation\File\UploadedFile;
+use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\StreamedResponse;
 use Symfony\Component\HttpKernel\Attribute\AsController;
 use Symfony\Component\Routing\Attribute\Route;
 use Symfony\Component\Security\Http\Attribute\IsGranted;
-use Symfony\Component\Serializer\SerializerInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
 
 #[AsController]
 #[IsGranted('ROLE_USER')]
@@ -26,6 +35,7 @@ final class BackofficeController extends AbstractController
         private readonly SeasonRepository $seasonRepository,
         private readonly CandidateRepository $candidateRepository,
         private readonly Security $security,
+        private readonly TranslatorInterface $translator,
     ) {}
 
     #[Route('/backoffice/', name: 'app_backoffice_index')]
@@ -43,6 +53,30 @@ final class BackofficeController extends AbstractController
         ]);
     }
 
+    #[Route('/backoffice/add', name: 'app_backoffice_season_add', priority: 10)]
+    public function seasonAdd(Request $request, EntityManagerInterface $em): Response
+    {
+        $season = new Season();
+        $form = $this->createForm(CreateSeasonFormType::class, $season);
+
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            $user = $this->getUser();
+            \assert($user instanceof User);
+
+            $season->addOwner($user);
+            $season->generateSeasonCode();
+
+            $em->persist($season);
+            $em->flush();
+
+            return $this->redirectToRoute('app_backoffice_season', ['seasonCode' => $season->getSeasonCode()]);
+        }
+
+        return $this->render('backoffice/season_add.html.twig', ['form' => $form]);
+    }
+
     #[Route('/backoffice/{seasonCode}', name: 'app_backoffice_season')]
     #[IsGranted(SeasonVoter::EDIT, subject: 'season')]
     public function season(Season $season): Response
@@ -72,9 +106,58 @@ final class BackofficeController extends AbstractController
         return $this->redirectToRoute('app_backoffice_season', ['seasonCode' => $season->getSeasonCode()]);
     }
 
-    #[Route('/backoffice/{seasonCode}/{quiz}/yaml')]
-    public function testRoute(Season $season, Quiz $quiz, SerializerInterface $serializer): Response
+    #[Route('/backoffice/{seasonCode}/add_candidate', name: 'app_backoffice_add_candidates', priority: 10)]
+    public function addCandidates(Season $season, Request $request, EntityManagerInterface $em): Response
     {
-        return new Response($serializer->serialize(\App\Resource\Quiz::fromEntity($quiz)->questions, 'yaml', ['yaml_inline' => 100, 'yaml_flags' => 0]), headers: ['Content-Type' => 'text/yaml']);
+        $form = $this->createForm(AddCandidatesFormType::class);
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            $candidates = $form->get('candidates')->getData();
+            foreach (explode("\r\n", $candidates) as $candidate) {
+                $season->addCandidate(new Candidate($candidate));
+            }
+            $em->flush();
+
+            return $this->redirectToRoute('app_backoffice_season', ['seasonCode' => $season->getSeasonCode()]);
+        }
+
+        return $this->render('backoffice/season_add_candidates.html.twig', ['form' => $form]);
+    }
+
+    #[Route('/backoffice/{seasonCode}/add', name: 'app_backoffice_quiz_add', priority: 10)]
+    public function addQuiz(Request $request, Season $season, QuizSpreadsheetService $quizSpreadsheet, EntityManagerInterface $em): Response
+    {
+        $quiz = new Quiz();
+        $form = $this->createForm(UploadQuizFormType::class, $quiz);
+
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            /* @var UploadedFile $sheet */
+            $sheet = $form->get('sheet')->getData();
+
+            $quizSpreadsheet->xlsxToQuiz($quiz, $sheet);
+
+            $quiz->setSeason($season);
+            $em->persist($quiz);
+            $em->flush();
+
+            $this->addFlash(FlashType::Success, $this->translator->trans('Quiz Added!'));
+
+            return $this->redirectToRoute('app_backoffice_season', ['seasonCode' => $season->getSeasonCode()]);
+        }
+
+        return $this->render('/backoffice/quiz_add.html.twig', ['form' => $form, 'season' => $season]);
+    }
+
+    #[Route('/backoffice/template', name: 'app_backoffice_template', priority: 10)]
+    public function getTemplate(QuizSpreadsheetService $excel): Response
+    {
+        $response = new StreamedResponse($excel->generateTemplate());
+        $response->headers->set('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
+        $response->headers->set('Content-Disposition', 'attachment; filename="template.xlsx"');
+
+        return $response;
     }
 }
diff --git a/src/DataFixtures/KrtekFixtures.php b/src/DataFixtures/KrtekFixtures.php
index 4169294..3a189fb 100644
--- a/src/DataFixtures/KrtekFixtures.php
+++ b/src/DataFixtures/KrtekFixtures.php
@@ -52,6 +52,7 @@ class KrtekFixtures extends Fixture
                 ->setQuestion('Is de Krtek een man of een vrouw?')
                 ->addAnswer(new Answer('Vrouw', true))
                 ->addAnswer(new Answer('Man'))
+                ->setOrdering(1)
             )
 
             ->addQuestion((new Question())
@@ -59,6 +60,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Geen', true))
                 ->addAnswer(new Answer('1'))
                 ->addAnswer(new Answer('2'))
+                ->setOrdering(2)
             )
 
             ->addQuestion((new Question())
@@ -68,12 +70,14 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Koningsdag'))
                 ->addAnswer(new Answer('Kerst', true))
                 ->addAnswer(new Answer('Oud en Nieuw'))
+                ->setOrdering(3)
             )
 
             ->addQuestion((new Question())
                 ->setQuestion('Hoe kwam de Krtek naar Kersteren vandaag?')
                 ->addAnswer(new Answer('Met het OV', true))
                 ->addAnswer(new Answer('Met de auto'))
+                ->setOrdering(4)
             )
             ->addQuestion((new Question())
                 ->setQuestion('Met wie keek de Krtek video bij binnenkomst?')
@@ -90,6 +94,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Remy'))
                 ->addAnswer(new Answer('Robbert'))
                 ->addAnswer(new Answer('Tom', true))
+                ->setOrdering(5)
             )
 
             ->addQuestion((new Question())
@@ -102,6 +107,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Probeer ook eens buiten de lijntjes te kleuren', true))
                 ->addAnswer(new Answer('Ga als je groot bent op groepsreis! '))
                 ->addAnswer(new Answer('Trek minder aan van de mening van anderen, het is oké om anders te zijn.'))
+                ->setOrdering(6)
             )
 
             ->addQuestion((new Question())
@@ -112,6 +118,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Pantoffels'))
                 ->addAnswer(new Answer('Hakken'))
                 ->addAnswer(new Answer('Geen schoenen, alleen sokken'))
+                ->setOrdering(7)
             )
 
             ->addQuestion((new Question())
@@ -119,12 +126,14 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Fiets', true))
                 ->addAnswer(new Answer('Auto'))
                 ->addAnswer(new Answer('Trein'))
+                ->setOrdering(8)
             )
 
             ->addQuestion((new Question())
                 ->setQuestion('Heeft de Krtek een eigen auto?')
                 ->addAnswer(new Answer('Ja'))
                 ->addAnswer(new Answer('Nee', true))
+                ->setOrdering(9)
             )
 
             ->addQuestion((new Question())
@@ -144,12 +153,14 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Pieter'))
                 ->addAnswer(new Answer('Renée Fokker'))
                 ->addAnswer(new Answer('Sam, Davy', true))
+                ->setOrdering(10)
             )
 
             ->addQuestion((new Question())
                 ->setQuestion('Zou de Krtek molboekjes, jokers, vrijstellingen of topito’s uit iemands rugzak stelen om te kunnen winnen?')
                 ->addAnswer(new Answer('Ja'))
                 ->addAnswer(new Answer('Nee', true))
+                ->setOrdering(11)
             )
 
             ->addQuestion((new Question())
@@ -157,6 +168,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Éénpersoons, losstaand bed'))
                 ->addAnswer(new Answer('Éénpersoonsbed, tegen een ander bed aan', true))
                 ->addAnswer(new Answer('Tweepersoons bed'))
+                ->setOrdering(12)
             )
 
             ->addQuestion((new Question())
@@ -165,12 +177,14 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('6', true))
                 ->addAnswer(new Answer('7'))
                 ->addAnswer(new Answer('8'))
+                ->setOrdering(13)
             )
 
             ->addQuestion((new Question())
                 ->setQuestion('Waar zat de Krtek aan tafel bij het diner?')
                 ->addAnswer(new Answer('Met de rug naar de accommodatie'))
                 ->addAnswer(new Answer('Met de rug naar de buitenmuur', true))
+                ->setOrdering(14)
             )
 
             ->addQuestion((new Question())
@@ -188,6 +202,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Remy'))
                 ->addAnswer(new Answer('Robbert'))
                 ->addAnswer(new Answer('Tom'))
+                ->setOrdering(15)
             )
         ;
     }
@@ -202,6 +217,7 @@ class KrtekFixtures extends Fixture
                 ->setQuestion('Is de Krtek een man of een vrouw?')
                 ->addAnswer(new Answer('Man'))
                 ->addAnswer(new Answer('Vrouw', true))
+                ->setOrdering(1)
             )
 
             ->addQuestion((new Question())
@@ -213,6 +229,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('De Krtek heeft een intolerantie'))
                 ->addAnswer(new Answer('De Krtek eet geen rundvlees'))
                 ->addAnswer(new Answer('De Krtek eet geen waterdieren'))
+                ->setOrdering(2)
             )
 
             ->addQuestion((new Question())
@@ -224,6 +241,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Tom'))
                 ->addAnswer(new Answer('De huisdieren van de Krtek hebben geen naam'))
                 ->addAnswer(new Answer('De Krtek heeft geen huisdieren', true))
+                ->setOrdering(3)
             )
 
             ->addQuestion((new Question())
@@ -234,6 +252,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Melk'))
                 ->addAnswer(new Answer('Sap'))
                 ->addAnswer(new Answer('Niks'))
+                ->setOrdering(4)
             )
 
             ->addQuestion((new Question())
@@ -245,6 +264,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Oostenrijk'))
                 ->addAnswer(new Answer('Turkije'))
                 ->addAnswer(new Answer('Zweden', true))
+                ->setOrdering(5)
             )
 
             ->addQuestion((new Question())
@@ -254,6 +274,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Het derde groepje'))
                 ->addAnswer(new Answer('Het vierde groepje'))
                 ->addAnswer(new Answer('Het vijfde groepje'))
+                ->setOrdering(6)
             )
 
             ->addQuestion((new Question())
@@ -262,12 +283,14 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Het universum', true))
                 ->addAnswer(new Answer('Toeval'))
                 ->addAnswer(new Answer('De Krtek is hindoeïstisch'))
+                ->setOrdering(7)
             )
 
             ->addQuestion((new Question())
                 ->setQuestion('At de Krtek op vrijdagavond heksenkaas tijdens het diner?')
                 ->addAnswer(new Answer('Ja', true))
                 ->addAnswer(new Answer('Nee'))
+                ->setOrdering(8)
             )
 
             ->addQuestion((new Question())
@@ -276,6 +299,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Tussen 1:00 en 1:59 uur', true))
                 ->addAnswer(new Answer('Tussen 2:00 en 2:59 uur'))
                 ->addAnswer(new Answer('Na 3:00'))
+                ->setOrdering(9)
             )
 
             ->addQuestion((new Question())
@@ -284,6 +308,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('2'))
                 ->addAnswer(new Answer('3'))
                 ->addAnswer(new Answer('geen', true))
+                ->setOrdering(10)
             )
 
             ->addQuestion((new Question())
@@ -294,6 +319,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Sesamstraat'))
                 ->addAnswer(new Answer('Spongebob Squarepants'))
                 ->addAnswer(new Answer('Teletubbies'))
+                ->setOrdering(11)
             )
 
             ->addQuestion((new Question())
@@ -301,6 +327,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('In koffer(s)', true))
                 ->addAnswer(new Answer('In losse tas(sen)'))
                 ->addAnswer(new Answer('In een rugzak'))
+                ->setOrdering(12)
             )
 
             ->addQuestion((new Question())
@@ -313,12 +340,14 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Servies dat tegen elkaar klettert'))
                 ->addAnswer(new Answer('Het geroekoe van een duif', true))
                 ->addAnswer(new Answer('Piepschuim'))
+                ->setOrdering(13)
             )
 
             ->addQuestion((new Question())
                 ->setQuestion('Wilde de Krtek penningmeester worden?')
                 ->addAnswer(new Answer('Ja'))
                 ->addAnswer(new Answer('Nee', true))
+                ->setOrdering(14)
             )
 
             ->addQuestion((new Question())
@@ -336,6 +365,7 @@ class KrtekFixtures extends Fixture
                 ->addAnswer(new Answer('Remy'))
                 ->addAnswer(new Answer('Robbert'))
                 ->addAnswer(new Answer('Tom'))
+                ->setOrdering(15)
             )
         ;
     }
diff --git a/src/Entity/Answer.php b/src/Entity/Answer.php
index bd7247d..119b1ee 100644
--- a/src/Entity/Answer.php
+++ b/src/Entity/Answer.php
@@ -7,6 +7,7 @@ namespace App\Entity;
 use App\Repository\AnswerRepository;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
+use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\IdGenerator\UuidGenerator;
 use Symfony\Bridge\Doctrine\Types\UuidType;
@@ -21,6 +22,9 @@ class Answer
     #[ORM\CustomIdGenerator(class: UuidGenerator::class)]
     private Uuid $id;
 
+    #[ORM\Column(type: Types::SMALLINT, options: ['default' => 0])]
+    private int $ordering;
+
     #[ORM\ManyToOne(inversedBy: 'answers')]
     #[ORM\JoinColumn(nullable: false)]
     private Question $question;
@@ -121,4 +125,16 @@ class Answer
 
         return $this;
     }
+
+    public function getOrdering(): int
+    {
+        return $this->ordering;
+    }
+
+    public function setOrdering(int $ordering): self
+    {
+        $this->ordering = $ordering;
+
+        return $this;
+    }
 }
diff --git a/src/Entity/Question.php b/src/Entity/Question.php
index 8177cbd..2c618f4 100644
--- a/src/Entity/Question.php
+++ b/src/Entity/Question.php
@@ -7,6 +7,7 @@ namespace App\Entity;
 use App\Repository\QuestionRepository;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
+use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\IdGenerator\UuidGenerator;
 use Symfony\Bridge\Doctrine\Types\UuidType;
@@ -21,7 +22,10 @@ class Question
     #[ORM\CustomIdGenerator(class: UuidGenerator::class)]
     private ?Uuid $id = null;
 
-    #[ORM\Column(length: 255, nullable: false)]
+    #[ORM\Column(type: Types::SMALLINT, options: ['default' => 0])]
+    private int $ordering;
+
+    #[ORM\Column(type: Types::STRING, length: 255)]
     private string $question;
 
     #[ORM\ManyToOne(inversedBy: 'questions')]
@@ -33,6 +37,7 @@ class Question
 
     /** @var Collection<int, Answer> */
     #[ORM\OneToMany(targetEntity: Answer::class, mappedBy: 'question', cascade: ['persist'], orphanRemoval: true)]
+    #[ORM\OrderBy(['ordering' => 'ASC'])]
     private Collection $answers;
 
     public function __construct()
@@ -115,4 +120,16 @@ class Question
 
         return null;
     }
+
+    public function getOrdering(): int
+    {
+        return $this->ordering;
+    }
+
+    public function setOrdering(int $ordering): static
+    {
+        $this->ordering = $ordering;
+
+        return $this;
+    }
 }
diff --git a/src/Entity/Quiz.php b/src/Entity/Quiz.php
index 06e3eb1..a238039 100644
--- a/src/Entity/Quiz.php
+++ b/src/Entity/Quiz.php
@@ -30,6 +30,7 @@ class Quiz
 
     /** @var Collection<int, Question> */
     #[ORM\OneToMany(targetEntity: Question::class, mappedBy: 'quiz', cascade: ['persist'], orphanRemoval: true)]
+    #[ORM\OrderBy(['ordering' => 'ASC'])]
     private Collection $questions;
 
     /** @var Collection<int, Correction> */
diff --git a/src/Entity/Season.php b/src/Entity/Season.php
index 287211e..00cf91e 100644
--- a/src/Entity/Season.php
+++ b/src/Entity/Season.php
@@ -15,6 +15,8 @@ use Symfony\Component\Uid\Uuid;
 #[ORM\Entity(repositoryClass: SeasonRepository::class)]
 class Season
 {
+    private const string SEASON_CODE_CHARACTERS = 'bcdfghjklmnpqrstvwxz';
+
     #[ORM\Id]
     #[ORM\Column(type: UuidType::NAME)]
     #[ORM\GeneratedValue(strategy: 'CUSTOM')]
@@ -148,4 +150,18 @@ class Season
     {
         return $this->owners->contains($user);
     }
+
+    public function generateSeasonCode(): self
+    {
+        $code = '';
+        $len = mb_strlen(self::SEASON_CODE_CHARACTERS) - 1;
+
+        for ($i = 0; $i < 5; ++$i) {
+            $code .= self::SEASON_CODE_CHARACTERS[random_int(0, $len)];
+        }
+
+        $this->seasonCode = $code;
+
+        return $this;
+    }
 }
diff --git a/src/Exception/SpreadsheetDataException.php b/src/Exception/SpreadsheetDataException.php
new file mode 100644
index 0000000..9b35dfd
--- /dev/null
+++ b/src/Exception/SpreadsheetDataException.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Exception;
+
+class SpreadsheetDataException extends SpreadsheetException
+{
+    /** @param list<string> $errors */
+    public function __construct(
+        public readonly array $errors,
+        string $message = '',
+        int $code = 0,
+        ?\Throwable $previous = null,
+    ) {
+        parent::__construct($message, $code, $previous);
+    }
+}
diff --git a/src/Exception/SpreadsheetException.php b/src/Exception/SpreadsheetException.php
new file mode 100644
index 0000000..33f01f0
--- /dev/null
+++ b/src/Exception/SpreadsheetException.php
@@ -0,0 +1,7 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Exception;
+
+class SpreadsheetException extends \Exception {}
diff --git a/src/Form/CreateSeasonFormType.php b/src/Form/CreateSeasonFormType.php
new file mode 100644
index 0000000..573546e
--- /dev/null
+++ b/src/Form/CreateSeasonFormType.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form;
+
+use App\Entity\Season;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
+/** @extends AbstractType<Season> */
+class CreateSeasonFormType extends AbstractType
+{
+    public function __construct(private readonly TranslatorInterface $translator) {}
+
+    public function buildForm(FormBuilderInterface $builder, array $options): void
+    {
+        $builder
+            ->add('name', TextType::class, [
+                'label' => $this->translator->trans('Season Name'),
+            ])
+        ;
+    }
+
+    public function configureOptions(OptionsResolver $resolver): void
+    {
+        $resolver->setDefaults([
+            'data_class' => Season::class,
+        ]);
+    }
+}
diff --git a/src/Form/UploadQuizFormType.php b/src/Form/UploadQuizFormType.php
new file mode 100644
index 0000000..2fe7615
--- /dev/null
+++ b/src/Form/UploadQuizFormType.php
@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form;
+
+use App\Entity\Quiz;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\FileType;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Component\Validator\Constraints\File;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
+/** @extends AbstractType<Quiz> */
+class UploadQuizFormType extends AbstractType
+{
+    public function __construct(private readonly TranslatorInterface $translator) {}
+
+    public function buildForm(FormBuilderInterface $builder, array $options): void
+    {
+        $builder
+            ->add('name', TextType::class, [
+                'label' => $this->translator->trans('Quiz name'),
+            ])
+            ->add('sheet', FileType::class, [
+                'label' => $this->translator->trans('Quiz (xlsx)'),
+                'mapped' => false,
+                'required' => true,
+                'constraints' => [
+                    new File([
+                        'maxSize' => '1024k',
+                        'mimeTypes' => [
+                            'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+                        ],
+                        'mimeTypesMessage' => $this->translator->trans('Please upload a valid XLSX file'),
+                    ]),
+                ],
+            ])
+        ;
+    }
+
+    public function configureOptions(OptionsResolver $resolver): void
+    {
+        $resolver->setDefaults([
+            'data_class' => Quiz::class,
+        ]);
+    }
+}
diff --git a/src/Resource/Quiz.php b/src/Resource/Quiz.php
deleted file mode 100644
index 22d2d2f..0000000
--- a/src/Resource/Quiz.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Resource;
-
-use App\Entity\Answer;
-use App\Entity\Quiz as QuizEntity;
-use Doctrine\Common\Collections\Collection;
-
-final class Quiz
-{
-    /** @param array<string, array<string, bool>> $questions*/
-    public function __construct(
-        public array $questions,
-    ) {}
-
-    public static function fromEntity(QuizEntity $quiz): self
-    {
-        $questions = [];
-
-        foreach ($quiz->getQuestions() as $question) {
-            $questions[$question->getQuestion()] = self::answerArray($question->getAnswers());
-        }
-
-        return new self($questions);
-    }
-
-    /** @param Collection<int, Answer> $answers
-     * @return array<string, bool>
-     **/
-    private static function answerArray(Collection $answers): array
-    {
-        $result = [];
-
-        foreach ($answers as $answer) {
-            $result[$answer->getText()] = $answer->isRightAnswer();
-        }
-
-        return $result;
-    }
-}
diff --git a/src/Service/QuizSpreadsheetService.php b/src/Service/QuizSpreadsheetService.php
new file mode 100644
index 0000000..19cd5dd
--- /dev/null
+++ b/src/Service/QuizSpreadsheetService.php
@@ -0,0 +1,123 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\Answer;
+use App\Entity\Question;
+use App\Entity\Quiz;
+use App\Exception\SpreadsheetDataException;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
+use Symfony\Component\HttpFoundation\File\File;
+
+class QuizSpreadsheetService
+{
+    public function generateTemplate(bool $fillExample = true): \Closure
+    {
+        $spreadsheet = new Spreadsheet();
+
+        $sheet = $spreadsheet->getActiveSheet();
+
+        $sheet->getStyle('1:1')->getFont()->setBold(true);
+
+        $sheet->setCellValue('A1', 'Question');
+        $sheet->getColumnDimension('A')->setWidth(30);
+        $sheet->getStyle('A:A')->getAlignment()->setWrapText(true);
+
+        $counter = 1;
+        foreach (range('B', 'L', 2) as $column) {
+            $sheet->setCellValue($column.'1', 'Answer '.$counter++);
+            $sheet->getColumnDimension($column)->setWidth(30);
+            $sheet->getStyle($column.':'.$column)->getAlignment()->setWrapText(true);
+        }
+
+        foreach (range('C', 'M', 2) as $column) {
+            $sheet->setCellValue($column.'1', 'Correct');
+            $sheet->getColumnDimension($column)->setAutoSize(true);
+        }
+
+        if ($fillExample) {
+            $sheet->setCellValue('B2', 'Man');
+            $sheet->setCellValue('C2', true);
+
+            $sheet->setCellValue('D2', 'Vrouw');
+            $sheet->setCellValue('E2', false);
+
+            $sheet->setCellValue('A2', 'Is de mol een man of een vrouw?');
+        }
+
+        return $this->toXlsx($spreadsheet);
+    }
+
+    /** @throws SpreadsheetDataException */
+    public function xlsxToQuiz(Quiz $quiz, File $file): Quiz
+    {
+        $spreadsheet = $this->readSheet($file);
+        $sheet = $spreadsheet->getSheet($spreadsheet->getFirstSheetIndex());
+
+        $answerLines = \array_slice($sheet->toArray(formatData: false), 1);
+
+        return $this->fillQuizFromArray($quiz, $answerLines);
+    }
+
+    private function readSheet(File $file): Spreadsheet
+    {
+        return (new \PhpOffice\PhpSpreadsheet\Reader\Xlsx())->setReadDataOnly(true)->load($file->getRealPath());
+    }
+
+    /**
+     * @param array<int, array<int, string|bool|null>> $sheet
+     *
+     * @throws SpreadsheetDataException
+     */
+    private function fillQuizFromArray(Quiz $quiz, array $sheet): Quiz
+    {
+        $errors = [];
+
+        $questionCounter = 1;
+        foreach ($sheet as $questionArr) {
+            if (null === $questionArr[0]) {
+                break;
+            }
+
+            $question = new Question();
+            $question->setQuestion((string) $questionArr[0]);
+            $question->setOrdering($questionCounter++);
+
+            $answerCounter = 1;
+            $arrCounter = 1;
+
+            while (true) {
+                if (null === $questionArr[$arrCounter]) {
+                    if (1 === $answerCounter) {
+                        $errors[] = \sprintf('Question %d has no answers', $answerCounter);
+                    }
+                    break;
+                }
+
+                $answer = new Answer((string) $questionArr[$arrCounter++], (bool) $questionArr[$arrCounter++]);
+                $answer->setOrdering($answerCounter++);
+                $question->addAnswer($answer);
+            }
+
+            $quiz->addQuestion($question);
+        }
+
+        if ([] !== $errors) {
+            throw new SpreadsheetDataException($errors);
+        }
+
+        return $quiz;
+    }
+
+    public function quizToXlsx(Quiz $quiz): void {}
+
+    private function toXlsx(Spreadsheet $spreadsheet): \Closure
+    {
+        $writer = new Xlsx($spreadsheet);
+
+        return static fn () => $writer->save('php://output');
+    }
+}
diff --git a/templates/backoffice/index.html.twig b/templates/backoffice/index.html.twig
index 1a925a3..fa1c9be 100644
--- a/templates/backoffice/index.html.twig
+++ b/templates/backoffice/index.html.twig
@@ -3,9 +3,14 @@
 {% block title %}Hello BackofficeController!{% endblock %}
 
 {% block body %}
-    <h2 class="py-2">
-        {{ is_granted('ROLE_ADMIN') ? 'All Seasons'|trans : 'Your Seasons'|trans }}
-    </h2>
+    <div class="d-flex flex-row align-items-center">
+        <h2 class="py-2 pe-2">
+            {{ is_granted('ROLE_ADMIN') ? 'All Seasons'|trans : 'Your Seasons'|trans }}
+        </h2>
+        <a class="link" href="{{ path('app_backoffice_season_add') }}">
+            {{ 'Add'|trans }}
+        </a>
+    </div>
     <table class="table table-hover">
         <thead>
         <tr>
diff --git a/templates/backoffice/nav.html.twig b/templates/backoffice/nav.html.twig
index d4a3eef..4424449 100644
--- a/templates/backoffice/nav.html.twig
+++ b/templates/backoffice/nav.html.twig
@@ -17,6 +17,10 @@
                         <a class="nav-link{% if 'app_backoffice_index' == app.current_route() %} active{% endif %}"
                            href="{{ path('app_backoffice_index') }}">{{ 'Seasons'|trans }}</a>
                     </li>
+                    <li class="nav-item">
+                        <a class="nav-link"
+                           href="{{ path('app_backoffice_template') }}">{{ 'Download Template'|trans }}</a>
+                    </li>
                 </ul>
                 <ul class="navbar-nav mb-auto me-2 me-lg-0">
                     <li class="nav-item">
diff --git a/templates/backoffice/quiz_add.html.twig b/templates/backoffice/quiz_add.html.twig
new file mode 100644
index 0000000..9a2e847
--- /dev/null
+++ b/templates/backoffice/quiz_add.html.twig
@@ -0,0 +1,25 @@
+{% extends 'backoffice/base.html.twig' %}
+
+{% block body %}
+    <div class="row">
+        <div class="col-md-6 col-12">
+            <h2 class="py-2">{{ 'Add a quiz to '|trans }} {{ season.name }}</h2>
+            {{ form_start(form) }}
+            {{ form_row(form.name) }}
+            {{ form_row(form.sheet) }}
+            <button type="submit" class="btn btn-primary">{{ 'Submit'|trans }}</button>
+            {{ form_end(form) }}
+        </div>
+        <div class="col-md-6 col-12">
+            <p class="pt-5">
+                Hier kan nog tekst komen met wat uitleg
+            </p>
+
+        </div>
+    </div>
+
+{% endblock %}
+
+{% block title %}
+
+{% endblock %}
diff --git a/templates/backoffice/season.html.twig b/templates/backoffice/season.html.twig
index 881954c..eb6a7f4 100644
--- a/templates/backoffice/season.html.twig
+++ b/templates/backoffice/season.html.twig
@@ -3,7 +3,11 @@
     <h2 class="py-2">{{ 'Season'|trans }}: {{ season.name }}</h2>
     <div class="row">
         <div class="col-md-6 col-12">
-            <h4 class="py-2">{{ 'Quizzes'|trans }}</h4>
+            <div class="d-flex flex-row align-items-center">
+                <h4 class="py-2 pe-2">{{ 'Quizzes'|trans }}</h4>
+                <a class="link"
+                   href="{{ path('app_backoffice_quiz_add', {seasonCode: season.seasonCode}) }}">{{ 'Add'|trans }}</a>
+            </div>
             <div class="list-group">
                 {% for quiz in season.quizzes %}
                     <a class="list-group-item list-group-item-action{% if season.activeQuiz == quiz %} active{% endif %}"
@@ -14,9 +18,10 @@
             </div>
         </div>
         <div class="col-md-3 col-12">
-            <div style="display: flex ;flex-direction: row; justify-content: space-between">
-                <h4 class="py-2">{{ 'Candidates'|trans }}</h4>
-                <button class="btn btn-outline-primary">{{ 'Add Candidate'|trans }}</button>
+            <div class="d-flex flex-row align-items-center">
+                <h4 class="py-2 pe-2">{{ 'Candidates'|trans }}</h4>
+                <a class="link"
+                   href="{{ path('app_backoffice_add_candidates', {seasonCode: season.seasonCode}) }}">{{ 'Add Candidate'|trans }}</a>
 
             </div>
             <ul>
diff --git a/templates/backoffice/season_add.html.twig b/templates/backoffice/season_add.html.twig
new file mode 100644
index 0000000..fa2953b
--- /dev/null
+++ b/templates/backoffice/season_add.html.twig
@@ -0,0 +1,22 @@
+{% extends 'backoffice/base.html.twig' %}
+
+{% block body %}
+    <div class="row">
+        <div class="col-md-6 col-12">
+            <h2 class="py-2">{{ 'Create a season'|trans }}</h2>
+            {{ form_start(form) }}
+            {{ form_row(form.name) }}
+            <button type="submit" class="btn btn-primary">{{ 'Submit'|trans }}</button>
+            {{ form_end(form) }}
+        </div>
+        <div class="col-md-6 col-12">
+            <p class="pt-5">
+                Hier kan nog tekst komen met wat uitleg
+            </p>
+        </div>
+    </div>
+{% endblock %}
+
+{% block title %}
+
+{% endblock %}
diff --git a/templates/backoffice/season_add_candidates.html.twig b/templates/backoffice/season_add_candidates.html.twig
new file mode 100644
index 0000000..783af97
--- /dev/null
+++ b/templates/backoffice/season_add_candidates.html.twig
@@ -0,0 +1,22 @@
+{% extends 'backoffice/base.html.twig' %}
+
+{% block body %}
+    <div class="row">
+        <div class="col-md-6 col-12">
+            <h2 class="py-2">{{ 'Add Candidates'|trans }}</h2>
+            {{ form_start(form) }}
+            {{ form_row(form.candidates) }}
+            <button type="submit" class="btn btn-primary">{{ 'Submit'|trans }}</button>
+            {{ form_end(form) }}
+        </div>
+        <div class="col-md-6 col-12">
+            <p class="pt-5">
+                Hier kan nog tekst komen met wat uitleg
+            </p>
+        </div>
+    </div>
+{% endblock %}
+
+{% block title %}
+
+{% endblock %}
diff --git a/translations/messages+intl-icu.nl.yaml b/translations/messages+intl-icu.nl.yaml
index 89afb52..0647845 100644
--- a/translations/messages+intl-icu.nl.yaml
+++ b/translations/messages+intl-icu.nl.yaml
@@ -1,5 +1,7 @@
 'Active Quiz': 'Actieve test'
+Add: Toevoegen
 'Add Candidate': 'Voeg kandidaat toe'
+'Add a quiz to': 'Voeg een test toe aan'
 'All Seasons': 'Alle seizoenen'
 'Already have an account? Log in': 'Heb je al een account? Log in'
 Candidate: Kandidaat
@@ -7,7 +9,9 @@ Candidate: Kandidaat
 Candidates: Kandidaten
 'Correct Answers': 'Goede antwoorden'
 Corrections: Jokers
+'Create a season': 'Maak een seizoen aan'
 'Create an account': 'Maak een account aan'
+'Download Template': 'Download sjabloon'
 Email: E-mail
 'Enter your name': 'Voor je naam in'
 'Invalid season code': 'Ongeldige seizoenscode'
@@ -24,19 +28,25 @@ Owner(s): Eigena(a)r(en)
 Password: Wachtwoord
 'Please Confirm your Email': messages
 'Please sign in': 'Log in aub'
+'Please upload a valid XLSX file': 'Upload een geldig XLSX-bestand'
 'Prepare Custom Elimination': 'Bereid aangepaste eliminatie voor'
 Questions: Vragen
 Quiz: Test
+'Quiz (xlsx)': 'Test (xlsx)'
+'Quiz Added!': 'Test toegevoegd!'
 'Quiz completed': 'Test voltooid'
+'Quiz name': Testnaam
 Quizzes: Tests
 Register: Registreren
 'Remember me': 'Onthoud mij'
 Score: Score
 Season: Seizoen
 'Season Code': Seizoenscode
+'Season Name': 'Seizoensnaam'
 Seasons: Seizoenen
 'Sign in': 'Log in'
 'Start Elimination': 'Start eliminatie'
+Submit: Verstuur
 'There are no answers for this question': 'Er zijn geen antwoorden voor deze vraag'
 Time: Tijd
 'Your Seasons': 'Jouw seizoenen'
diff --git a/translations/validators.nl.yaml b/translations/validators.nl.yaml
new file mode 100644
index 0000000..5f66ba8
--- /dev/null
+++ b/translations/validators.nl.yaml
@@ -0,0 +1,4 @@
+Error: Fout
+'Please enter a password': 'Voer je wachtwoord in'
+'There is already an account with this email': 'Er is al een account met dit e-mailadres'
+'Your password should be at least {{ limit }} characters': 'Je wachtwoord moet minimaal {{ limit }} karakters lang zijn'