diff --git a/backend/app/Http/Controllers/ScheduleController.php b/backend/app/Http/Controllers/ScheduleController.php
index fb0bb40..cc8cd60 100644
--- a/backend/app/Http/Controllers/ScheduleController.php
+++ b/backend/app/Http/Controllers/ScheduleController.php
@@ -34,7 +34,7 @@ class ScheduleController extends Controller
                 new CreateScheduleRequest(
                     user: $user,
                     setId: $input->integer('setId'),
-                    elementKind: $input->string('elementKind'),
+                    levelId: $input->integer('levelId'),
                     startDate: $input->string('startDate'),
                     targetDate: $input->string('targetDate'),
                 ),
diff --git a/backend/app/Http/Controllers/SetController.php b/backend/app/Http/Controllers/SetController.php
index 024e83c..fe09b72 100644
--- a/backend/app/Http/Controllers/SetController.php
+++ b/backend/app/Http/Controllers/SetController.php
@@ -7,6 +7,7 @@ use App\Set\Set;
 use App\Set\UseCases\GetSetLayout\ElementLayoutNode;
 use App\Set\UseCases\GetSetLayout\GetSetLayout;
 use App\Set\UseCases\GetSetLayout\GetSetLayoutRequest;
+use App\Set\UseCases\GetSetLayout\SetLayoutLevel;
 use App\Set\UseCases\ListSets\ListSets;
 use Illuminate\Http\JsonResponse;
 
@@ -49,6 +50,19 @@ class SetController extends Controller
                 'id' => $set->getId(),
                 'name' => $set->getName(),
             ],
+            'levels' => array_map(
+                function (SetLayoutLevel $layoutLevel): array {
+                    $level = $layoutLevel->getLevel();
+
+                    return [
+                        'id' => $level->getId(),
+                        'kind' => $level->getKind(),
+                        'depth' => $level->getDepth(),
+                        'elementCount' => $layoutLevel->getElementCount(),
+                    ];
+                },
+                $layout->getLevels(),
+            ),
             'elements' => array_map(
                 function (ElementLayoutNode $node): array {
                     return $this->elementPayload($node);
@@ -63,6 +77,7 @@ class SetController extends Controller
      *     id: int,
      *     name: string,
      *     kind: string,
+     *     levelId: int,
      *     children: list<mixed>
      * }
      */
@@ -74,6 +89,7 @@ class SetController extends Controller
             'id' => $element->getId(),
             'name' => $element->getName(),
             'kind' => $element->getKind(),
+            'levelId' => $element->getLevel()->getId(),
             'children' => array_map(
                 function (ElementLayoutNode $childNode): array {
                     return $this->elementPayload($childNode);
diff --git a/backend/app/Schedule/UseCases/CreateSchedule/CreateSchedule.php b/backend/app/Schedule/UseCases/CreateSchedule/CreateSchedule.php
index 1759d73..fb8635e 100644
--- a/backend/app/Schedule/UseCases/CreateSchedule/CreateSchedule.php
+++ b/backend/app/Schedule/UseCases/CreateSchedule/CreateSchedule.php
@@ -11,6 +11,7 @@ use App\Schedule\CreateScheduleDto;
 use App\Schedule\Schedule;
 use App\Schedule\ScheduleRepository;
 use App\Set\Set;
+use App\Set\SetLevelRepository;
 use App\Set\SetRepository;
 use DateTimeImmutable;
 use DateTimeZone;
@@ -19,6 +20,7 @@ class CreateSchedule
 {
     public function __construct(
         private SetRepository $setRepository,
+        private SetLevelRepository $setLevelRepository,
         private ElementRepository $elementRepository,
         private ScheduleRepository $scheduleRepository,
     ) {}
@@ -38,8 +40,18 @@ class CreateSchedule
             throw new NotFoundException('set not found');
         }
 
-        if ($request->elementKind === null || $request->elementKind === '') {
-            throw new BadRequestException('elementKind is required');
+        if ($request->levelId === null || $request->levelId < 1) {
+            throw new BadRequestException('levelId is required');
+        }
+
+        $level = $this->setLevelRepository->find($request->levelId);
+        if (
+            $level === null
+            || $level->getSet()->getId() !== $set->getId()
+        ) {
+            throw new BadRequestException(
+                'level is not available for set',
+            );
         }
 
         $startDate = $this->parseDate($request->startDate, 'startDate');
@@ -52,14 +64,12 @@ class CreateSchedule
 
         $elements = array_values(array_filter(
             $this->orderedElements($set),
-            function (Element $element) use ($request): bool {
-                return $element->getKind() === $request->elementKind;
+            function (Element $element) use ($level): bool {
+                return $element->getLevel()->getId() === $level->getId();
             },
         ));
         if ($elements === []) {
-            throw new BadRequestException(
-                'elementKind is not available for set',
-            );
+            throw new BadRequestException('level has no elements');
         }
 
         $assignments = $this->assignments(
@@ -71,7 +81,7 @@ class CreateSchedule
         return $this->scheduleRepository->create(new CreateScheduleDto(
             user: $request->user,
             setName: $set->getName(),
-            elementKind: $request->elementKind,
+            elementKind: $level->getKind(),
             startDate: $startDate,
             targetDate: $targetDate,
             assignments: $assignments,
diff --git a/backend/app/Schedule/UseCases/CreateSchedule/CreateScheduleRequest.php b/backend/app/Schedule/UseCases/CreateSchedule/CreateScheduleRequest.php
index d75ab71..70ab5db 100644
--- a/backend/app/Schedule/UseCases/CreateSchedule/CreateScheduleRequest.php
+++ b/backend/app/Schedule/UseCases/CreateSchedule/CreateScheduleRequest.php
@@ -9,7 +9,7 @@ final readonly class CreateScheduleRequest
     public function __construct(
         public User $user,
         public ?int $setId,
-        public ?string $elementKind,
+        public ?int $levelId,
         public ?string $startDate,
         public ?string $targetDate,
     ) {}
diff --git a/backend/app/Set/UseCases/GetSetLayout/GetSetLayout.php b/backend/app/Set/UseCases/GetSetLayout/GetSetLayout.php
index 39085e1..12c59d9 100644
--- a/backend/app/Set/UseCases/GetSetLayout/GetSetLayout.php
+++ b/backend/app/Set/UseCases/GetSetLayout/GetSetLayout.php
@@ -6,11 +6,13 @@ use App\Element\Element;
 use App\Element\ElementRepository;
 use App\Exceptions\NotFoundException;
 use App\Set\SetRepository;
+use App\Set\SetLevelRepository;
 
 class GetSetLayout
 {
     public function __construct(
         private SetRepository $setRepository,
+        private SetLevelRepository $setLevelRepository,
         private ElementRepository $elementRepository,
     ) {}
 
@@ -24,10 +26,15 @@ class GetSetLayout
             throw new NotFoundException('set not found');
         }
 
+        $elements = $this->elementRepository->findBySet($set);
         $elementsByParentId = [];
-        foreach ($this->elementRepository->findBySet($set) as $element) {
+        $elementCountsByLevelId = [];
+        foreach ($elements as $element) {
             $parentId = $element->getParentElement()?->getId() ?? 0;
             $elementsByParentId[$parentId][] = $element;
+            $levelId = $element->getLevel()->getId();
+            $elementCountsByLevelId[$levelId]
+                = ($elementCountsByLevelId[$levelId] ?? 0) + 1;
         }
 
         foreach ($elementsByParentId as &$siblings) {
@@ -46,8 +53,17 @@ class GetSetLayout
         }
         unset($siblings);
 
+        $layoutLevels = [];
+        foreach ($this->setLevelRepository->findBySet($set) as $level) {
+            $layoutLevels[] = new SetLayoutLevel(
+                level: $level,
+                elementCount: $elementCountsByLevelId[$level->getId()] ?? 0,
+            );
+        }
+
         return new SetLayout(
             set: $set,
+            levels: $layoutLevels,
             elements: $this->buildNodes(0, $elementsByParentId),
         );
     }
diff --git a/backend/app/Set/UseCases/GetSetLayout/SetLayout.php b/backend/app/Set/UseCases/GetSetLayout/SetLayout.php
index c98974a..69cf008 100644
--- a/backend/app/Set/UseCases/GetSetLayout/SetLayout.php
+++ b/backend/app/Set/UseCases/GetSetLayout/SetLayout.php
@@ -7,10 +7,12 @@ use App\Set\Set;
 final readonly class SetLayout
 {
     /**
+     * @param list<SetLayoutLevel> $levels
      * @param list<ElementLayoutNode> $elements
      */
     public function __construct(
         private Set $set,
+        private array $levels,
         private array $elements,
     ) {}
 
@@ -19,6 +21,14 @@ final readonly class SetLayout
         return $this->set;
     }
 
+    /**
+     * @return list<SetLayoutLevel>
+     */
+    public function getLevels(): array
+    {
+        return $this->levels;
+    }
+
     /**
      * @return list<ElementLayoutNode>
      */
diff --git a/backend/app/Set/UseCases/GetSetLayout/SetLayoutLevel.php b/backend/app/Set/UseCases/GetSetLayout/SetLayoutLevel.php
new file mode 100644
index 0000000..6ebac06
--- /dev/null
+++ b/backend/app/Set/UseCases/GetSetLayout/SetLayoutLevel.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Set\UseCases\GetSetLayout;
+
+use App\Set\SetLevel;
+
+final readonly class SetLayoutLevel
+{
+    public function __construct(
+        private SetLevel $level,
+        private int $elementCount,
+    ) {}
+
+    public function getLevel(): SetLevel
+    {
+        return $this->level;
+    }
+
+    public function getElementCount(): int
+    {
+        return $this->elementCount;
+    }
+}
diff --git a/backend/database/seeders/DatabaseSeeder.php b/backend/database/seeders/DatabaseSeeder.php
index c90217c..afd1905 100644
--- a/backend/database/seeders/DatabaseSeeder.php
+++ b/backend/database/seeders/DatabaseSeeder.php
@@ -13,6 +13,7 @@ class DatabaseSeeder extends Seeder
     {
         $this->call(UserSeeder::class);
         $this->call(SetSeeder::class);
+        $this->call(SetLevelSeeder::class);
         $this->call(ElementSeeder::class);
     }
 }
diff --git a/backend/database/seeders/ElementSeeder.php b/backend/database/seeders/ElementSeeder.php
index bde3ed9..52fe294 100644
--- a/backend/database/seeders/ElementSeeder.php
+++ b/backend/database/seeders/ElementSeeder.php
@@ -6,8 +6,11 @@ use App\Element\CreateElementDto;
 use App\Element\Element;
 use App\Element\ElementRepository;
 use App\Set\Set;
+use App\Set\SetLevel;
+use App\Set\SetLevelRepository;
 use App\Set\SetRepository;
 use Illuminate\Database\Seeder;
+use RuntimeException;
 
 class ElementSeeder extends Seeder
 {
@@ -15,38 +18,31 @@ class ElementSeeder extends Seeder
         'Bible' => [
             [
                 'name' => 'Genesis',
-                'kind' => 'book',
                 'children' => [
                     [
                         'name' => 'Creation',
-                        'kind' => 'portion',
                         'children' => [
                             [
                                 'name' => 'Chapter 1',
-                                'kind' => 'chapter',
                                 'children' => [],
                             ],
                             [
                                 'name' => 'Chapter 2',
-                                'kind' => 'chapter',
                                 'children' => [],
                             ],
                         ],
                     ],
                     [
                         'name' => 'Noah',
-                        'kind' => 'portion',
                         'children' => [],
                     ],
                 ],
             ],
             [
                 'name' => 'Exodus',
-                'kind' => 'book',
                 'children' => [
                     [
                         'name' => 'Shemot',
-                        'kind' => 'portion',
                         'children' => [],
                     ],
                 ],
@@ -55,32 +51,26 @@ class ElementSeeder extends Seeder
         'Course' => [
             [
                 'name' => 'Foundations',
-                'kind' => 'module',
                 'children' => [
                     [
                         'name' => 'Welcome',
-                        'kind' => 'lesson',
                         'children' => [],
                     ],
                     [
                         'name' => 'Core Concepts',
-                        'kind' => 'lesson',
                         'children' => [],
                     ],
                 ],
             ],
             [
                 'name' => 'Applied Practice',
-                'kind' => 'module',
                 'children' => [
                     [
                         'name' => 'Guided Exercise',
-                        'kind' => 'lesson',
                         'children' => [],
                     ],
                     [
                         'name' => 'Final Review',
-                        'kind' => 'lesson',
                         'children' => [],
                     ],
                 ],
@@ -89,31 +79,25 @@ class ElementSeeder extends Seeder
         'Fitness Program' => [
             [
                 'name' => 'Foundation Phase',
-                'kind' => 'phase',
                 'children' => [
                     [
                         'name' => 'Strength Day',
-                        'kind' => 'workout',
                         'children' => [
                             [
                                 'name' => 'Squat',
-                                'kind' => 'exercise',
                                 'children' => [],
                             ],
                             [
                                 'name' => 'Push-up',
-                                'kind' => 'exercise',
                                 'children' => [],
                             ],
                         ],
                     ],
                     [
                         'name' => 'Mobility Day',
-                        'kind' => 'workout',
                         'children' => [
                             [
                                 'name' => 'Hip Flow',
-                                'kind' => 'exercise',
                                 'children' => [],
                             ],
                         ],
@@ -122,11 +106,9 @@ class ElementSeeder extends Seeder
             ],
             [
                 'name' => 'Build Phase',
-                'kind' => 'phase',
                 'children' => [
                     [
                         'name' => 'Full Body Circuit',
-                        'kind' => 'workout',
                         'children' => [],
                     ],
                 ],
@@ -137,6 +119,7 @@ class ElementSeeder extends Seeder
     public function run(): void
     {
         $elementRepository = app(ElementRepository::class);
+        $setLevelRepository = app(SetLevelRepository::class);
 
         foreach (app(SetRepository::class)->all() as $set) {
             $definitions = self::ELEMENTS_BY_SET[$set->getName()] ?? null;
@@ -147,6 +130,8 @@ class ElementSeeder extends Seeder
             $this->seedChildren(
                 repository: $elementRepository,
                 set: $set,
+                levels: $setLevelRepository->findBySet($set),
+                depth: 0,
                 parentElement: null,
                 definitions: $definitions,
             );
@@ -156,16 +141,27 @@ class ElementSeeder extends Seeder
     /**
      * @param list<array{
      *     name: string,
-     *     kind: string,
      *     children: list<mixed>
      * }> $definitions
+     * @param list<SetLevel> $levels
      */
     private function seedChildren(
         ElementRepository $repository,
         Set $set,
+        array $levels,
+        int $depth,
         ?Element $parentElement,
         array $definitions,
     ): void {
+        if ($definitions === []) {
+            return;
+        }
+
+        $level = $levels[$depth] ?? null;
+        if ($level === null) {
+            throw new RuntimeException('element level not defined');
+        }
+
         $siblings = $parentElement === null
             ? $repository->findTopLevelBySet($set)
             : $repository->findByParentElement($parentElement);
@@ -174,13 +170,12 @@ class ElementSeeder extends Seeder
             $element = $this->findSibling(
                 siblings: $siblings,
                 name: $definition['name'],
-                kind: $definition['kind'],
+                level: $level,
             );
             if ($element === null) {
                 $element = $repository->create(new CreateElementDto(
-                    set: $set,
                     name: $definition['name'],
-                    kind: $definition['kind'],
+                    level: $level,
                     parentElement: $parentElement,
                 ));
                 $siblings[] = $element;
@@ -189,6 +184,8 @@ class ElementSeeder extends Seeder
             $this->seedChildren(
                 repository: $repository,
                 set: $set,
+                levels: $levels,
+                depth: $depth + 1,
                 parentElement: $element,
                 definitions: $definition['children'],
             );
@@ -201,12 +198,12 @@ class ElementSeeder extends Seeder
     private function findSibling(
         array $siblings,
         string $name,
-        string $kind,
+        SetLevel $level,
     ): ?Element {
         foreach ($siblings as $sibling) {
             if (
                 $sibling->getName() === $name
-                && $sibling->getKind() === $kind
+                && $sibling->getLevel()->getId() === $level->getId()
             ) {
                 return $sibling;
             }
diff --git a/backend/database/seeders/SetLevelSeeder.php b/backend/database/seeders/SetLevelSeeder.php
new file mode 100644
index 0000000..72c239c
--- /dev/null
+++ b/backend/database/seeders/SetLevelSeeder.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Database\Seeders;
+
+use App\Set\CreateSetLevelDto;
+use App\Set\SetLevelRepository;
+use App\Set\SetRepository;
+use Illuminate\Database\Seeder;
+
+class SetLevelSeeder extends Seeder
+{
+    private const array KINDS_BY_SET = [
+        'Bible' => ['book', 'portion', 'chapter'],
+        'Course' => ['module', 'lesson'],
+        'Fitness Program' => ['phase', 'workout', 'exercise'],
+    ];
+
+    public function run(): void
+    {
+        $repository = app(SetLevelRepository::class);
+
+        foreach (app(SetRepository::class)->all() as $set) {
+            $kinds = self::KINDS_BY_SET[$set->getName()] ?? null;
+            if ($kinds === null) {
+                continue;
+            }
+
+            $existingKinds = array_map(function ($level): string {
+                return $level->getKind();
+            }, $repository->findBySet($set));
+
+            foreach ($kinds as $kind) {
+                if (in_array($kind, $existingKinds, true)) {
+                    continue;
+                }
+
+                $repository->create(new CreateSetLevelDto(
+                    set: $set,
+                    kind: $kind,
+                ));
+                $existingKinds[] = $kind;
+            }
+        }
+    }
+}