diff --git a/client/src/components/modules/ModuleFilter.vue b/client/src/components/modules/ModuleFilter.vue
index 731b143a..e1ff9bae 100644
--- a/client/src/components/modules/ModuleFilter.vue
+++ b/client/src/components/modules/ModuleFilter.vue
@@ -9,9 +9,9 @@
 
       <Dropdown
         class="module-filter__dropdown"
-        :selected-item="selectedLernfeld"
-        :items="lernfeldOptions"
-        @update:selectedItem="newItem => selectedLernfeld = newItem"
+        :selected-item="selectedCategory"
+        :items="categoryOptions"
+        @update:selectedItem="newItem => selectedCategory = newItem"
       ></Dropdown>
       <pill-radio-buttons :selectableItems="languageOptions"
                           :defaultSelectedItem="initialLanguage"
@@ -67,7 +67,7 @@
     }
   `);
 
-  const nullCategory = {
+  const nullLevel = {
     name: '---',
     id: null,
   };
@@ -76,27 +76,27 @@
   let selectedLevel = ref(defaultLevel);
 
   const levelOptions = computed(() => {
-    return [nullCategory, ...moduleLevelsResult.value?.moduleLevels || []];
+    return [nullLevel, ...moduleLevelsResult.value?.moduleLevels || []];
   });
 
-  const nullLernfeld = {
+  const nullCategory = {
     name: '---',
     id: null,
   };
 
-  const selectedLernfeld = ref(nullLernfeld);
+  const selectedCategory = ref(nullCategory);
 
-  const {result: moduleCategoryTypesResult} = useQuery(gql`
-    query ModuleCategoryTypesQuery {
-      moduleCategoryTypes {
+  const {result: moduleCategoryResult} = useQuery(gql`
+    query ModuleCategoriesQuery {
+      moduleCategories {
         name
         id
       }
     }
   `);
 
-  const lernfeldOptions = computed(() => {
-    return [nullLernfeld, ...moduleCategoryTypesResult.value?.moduleCategoryTypes || []];
+  const categoryOptions = computed(() => {
+    return [nullCategory, ...moduleCategoryResult.value?.moduleCategoryTypes || []];
   });
 
 
@@ -117,17 +117,17 @@
       return props.modules;
     }
 
-    // filter by Lehrjahr
+    // filter by Lehrjahr (moduleLevel)
     if (selectedLevel.value.name !== '---') {
       filteredModules = filteredModules.filter((module) => {
         return module.level?.id == selectedLevel.value.id;
       });
     }
 
-    //filter by Lernfeld
-    if (selectedLernfeld.value.name !== '---') {
+    //filter by Lernfeld (Category)
+    if (selectedCategory.value.name !== '---') {
       filteredModules = filteredModules.filter((module) => {
-        return module.categoryType?.id == selectedLernfeld.value.id;
+        return module.category?.id == selectedCategory.value.id;
       });
     }
     updateLastModuleLevel(selectedLevel.value);
diff --git a/client/src/components/modules/ModuleTeaser.vue b/client/src/components/modules/ModuleTeaser.vue
index 57a459a2..0ab7ff56 100644
--- a/client/src/components/modules/ModuleTeaser.vue
+++ b/client/src/components/modules/ModuleTeaser.vue
@@ -19,7 +19,7 @@
       </p>
       <div class="module-teaser__pills">
           <pill :text="level?.name"></pill>
-          <pill :text="categoryType?.name"></pill>
+          <pill :text="category?.name"></pill>
       </div>
     </div>
   </router-link>
@@ -30,7 +30,7 @@
 
   export default {
     components: {Pill},
-    props: ['metaTitle', 'title', 'teaser', 'id', 'slug', 'heroImage', 'level', 'categoryType'],
+    props: ['metaTitle', 'title', 'teaser', 'id', 'slug', 'heroImage', 'level', 'category'],
 
 
     computed: {
diff --git a/client/src/graphql/gql/fragments/moduleParts.gql b/client/src/graphql/gql/fragments/moduleParts.gql
index 9a03d012..9b42877f 100644
--- a/client/src/graphql/gql/fragments/moduleParts.gql
+++ b/client/src/graphql/gql/fragments/moduleParts.gql
@@ -13,7 +13,7 @@ fragment ModuleParts on ModuleNode {
     id
     name
   }
-  categoryType {
+  category {
     id
     name
   }
diff --git a/server/books/categorize_modules.py b/server/books/categorize_modules.py
index 4cd8f329..527b20a5 100644
--- a/server/books/categorize_modules.py
+++ b/server/books/categorize_modules.py
@@ -1,4 +1,4 @@
-from .models.module import Module, ModuleLevel, ModuleType
+from .models.module import Module, ModuleLevel, ModuleCategory
 
 def analyze_module_meta_titles():
     all_nodes = []
@@ -17,36 +17,36 @@ def analyze_module_meta_titles():
         print(f"{i}.: {set(leafs)}")
 
 
-def create_default_categories():
+def create_default_levcels_and_categories():
     for lehrjahr in range(1,4):
         module_category, created = ModuleLevel.objects.get_or_create(name=f"{lehrjahr}. Lehrjahr")
 
-    for type in range(1, 10):
-        ModuleType.objects.get_or_create(name=f"Lernfeld {type}")
+    for category in range(1, 10):
+        ModuleCategory.objects.get_or_create(name=f"Lernfeld {category}")
 
 
 def categorize_modules():
-    for category in ModuleLevel.objects.all():
-        modules = Module.objects.filter(category__isnull=True, meta_title__icontains=category.name)
+    for level in ModuleLevel.objects.all():
+        modules = Module.objects.filter(level__isnull=True, meta_title__icontains=level.name)
+        print(f"{level.name}: {modules.count()}")
+        modules.update(level=level)
+
+    for category in ModuleCategory.objects.all():
+        modules = Module.objects.filter(category__isnull=True, meta_title__contains=type.name)
         print(f"{category.name}: {modules.count()}")
         modules.update(category=category)
 
-    for type in ModuleType.objects.all():
-        modules = Module.objects.filter(category_type__isnull=True, meta_title__contains=type.name)
-        print(f"{type.name}: {modules.count()}")
-        modules.update(category_type=type)
-
 
 def uncategorize_modules():
-    ModuleType.objects.all().delete()
+    ModuleCategory.objects.all().delete()
     ModuleLevel.objects.all().delete()
 
+def delete_unused_levels():
+    for level in ModuleLevel.objects.all():
+        if not level.module_set.exists():
+            level.delete()
+
 def delete_unused_categories():
-    for category in ModuleLevel.objects.all():
+    for category in ModuleCategory.objects.all():
         if not category.module_set.exists():
             category.delete()
-
-def delete_unused_types():
-    for type in ModuleType.objects.all():
-        if not type.module_set.exists():
-            type.delete()
diff --git a/server/books/factories.py b/server/books/factories.py
index 5b89ffe7..a1d1cf84 100644
--- a/server/books/factories.py
+++ b/server/books/factories.py
@@ -28,7 +28,7 @@ from books.blocks import (
     SurveyBlock,
     VideoBlock,
 )
-from books.models import Book, Chapter, ContentBlock, Module, TextBlock, Topic, ModuleLevel, ModuleType
+from books.models import Book, Chapter, ContentBlock, Module, TextBlock, Topic, ModuleLevel, ModuleCategory
 from core.factories import (
     BasePageFactory,
     DummyImageFactory,
@@ -209,7 +209,7 @@ class ModuleLevelFactory(factory.DjangoModelFactory):
 
 class ModuleTypeFactory(factory.DjangoModelFactory):
     class Meta:
-        model = ModuleType
+        model = ModuleCategory
     name = 'Lernfeld 1'
 
 
diff --git a/server/books/management/commands/categorize_modules.py b/server/books/management/commands/categorize_modules.py
index 96a4711e..0e7d7ef0 100644
--- a/server/books/management/commands/categorize_modules.py
+++ b/server/books/management/commands/categorize_modules.py
@@ -1,16 +1,16 @@
 from django.core.management import BaseCommand
-from books.categorize_modules import categorize_modules, delete_unused_categories, delete_unused_types, uncategorize_modules
-
-from books.categorize_modules import create_default_categories
+from books.categorize_modules import categorize_modules, delete_unused_levels, uncategorize_modules, \
+    delete_unused_categories
+from books.categorize_modules import create_default_levcels_and_categories
 
 
 class Command(BaseCommand):
     def handle(self, *args, **options):
         self.stdout.write("Categorizing modules")
         uncategorize_modules()
-        create_default_categories()
+        create_default_levcels_and_categories()
         categorize_modules()
-        delete_unused_types()
+        delete_unused_levels()
         delete_unused_categories()
 
         self.stdout.write("Finish categorizing modules")
diff --git a/server/books/management/commands/create_default_model_categories.py b/server/books/management/commands/create_default_model_categories.py
index 1b378ce3..7c053814 100644
--- a/server/books/management/commands/create_default_model_categories.py
+++ b/server/books/management/commands/create_default_model_categories.py
@@ -1,11 +1,11 @@
 from django.core.management import BaseCommand
-from books.categorize_modules import categorize_modules, create_default_categories
+from books.categorize_modules import categorize_modules, create_default_levcels_and_categories
 
 
 class Command(BaseCommand):
     def handle(self, *args, **options):
         self.stdout.write("Create defaut categories")
-        create_default_categories()
+        create_default_levcels_and_categories()
         self.stdout.write("Finish")
 
 
diff --git a/server/books/models/module.py b/server/books/models/module.py
index e236bfee..d732df28 100644
--- a/server/books/models/module.py
+++ b/server/books/models/module.py
@@ -24,7 +24,7 @@ def default_category():
     return ModuleLevel.objects.first().pk
 
 
-class ModuleType(models.Model):
+class ModuleCategory(models.Model):
     class Meta:
         verbose_name = _("module type")
         verbose_name_plural = _("module types")
@@ -43,7 +43,7 @@ class Module(StrictHierarchyPage):
 
     meta_title = models.CharField(max_length=255, help_text="e.g. 'Intro' or 'Modul 1'")
     level = models.ForeignKey(ModuleLevel, on_delete=models.SET_NULL, blank=True, null=True)
-    category_type = models.ForeignKey(ModuleType, on_delete=models.SET_NULL, blank=True, null=True)
+    category = models.ForeignKey(ModuleCategory, on_delete=models.SET_NULL, blank=True, null=True)
 
 
     hero_image = models.ForeignKey(
@@ -66,7 +66,7 @@ class Module(StrictHierarchyPage):
         FieldPanel("title", classname="full title"),
         FieldPanel("meta_title", classname="full title"),
         FieldPanel("level"),
-        FieldPanel("category_type"),
+        FieldPanel("category"),
         FieldPanel("hero_image"),
         FieldPanel("hero_source"),
         FieldPanel("teaser"),
diff --git a/server/books/schema/nodes/module.py b/server/books/schema/nodes/module.py
index dbbd2fbd..b38b4480 100644
--- a/server/books/schema/nodes/module.py
+++ b/server/books/schema/nodes/module.py
@@ -6,11 +6,11 @@ from graphene_django.filter import DjangoFilterConnectionField
 
 from assignments.models import StudentSubmission
 from assignments.schema.types import AssignmentNode, StudentSubmissionNode
-from books.models import Module, Chapter, ContentBlock, RecentModule, ModuleLevel, ModuleType
+from books.models import Module, Chapter, ContentBlock, RecentModule, ModuleLevel, ModuleCategory
 from books.schema.interfaces.module import ModuleInterface
 from books.schema.nodes.chapter import ChapterNode
-from books.schema.nodes.module_category import ModuleLevelNode
-from books.schema.nodes.module_category_type import ModuleCategoryTypeNode
+from books.schema.nodes.module_level import ModuleLevelNode
+from books.schema.nodes.module_category import ModuleCategoryNode
 from notes.models import ModuleBookmark, ContentBlockBookmark, ChapterBookmark
 from notes.schema import (
     ModuleBookmarkNode,
@@ -37,7 +37,7 @@ class ModuleNode(DjangoObjectType):
             "hero_source",
             "topic",
             "level",
-            "category_type",
+            "category",
         ]
         filter_fields = {
             "slug": ["exact", "icontains", "in"],
@@ -56,8 +56,8 @@ class ModuleNode(DjangoObjectType):
     snapshots = graphene.List("books.schema.nodes.SnapshotNode")
     objective_groups = graphene.List(ObjectiveGroupNode)
     assignments = graphene.List(AssignmentNode)
-    category = graphene.Field(ModuleLevelNode)
-    category_type = graphene.Field(ModuleCategoryTypeNode)
+    level = graphene.Field(ModuleLevelNode)
+    category = graphene.Field(ModuleCategoryNode)
 
     def resolve_chapters(self, info, **kwargs):
         return Chapter.get_by_parent(self)
@@ -110,11 +110,11 @@ class ModuleNode(DjangoObjectType):
     def resolve_objective_groups(parent, info, **kwargs):
         return parent.objective_groups.all().prefetch_related("hidden_for")
 
-    def resolve_category(self, info, **kwargs):
-        return ModuleLevel.objects.get(pk=self.category_id) if self.category_id else None
+    def resolve_level(self, info, **kwargs):
+        return ModuleLevel.objects.get(pk=self.level_id) if self.level_id else None
 
-    def resolve_category_type(self, info, **kwargs):
-        return ModuleType.objects.get(pk=self.category_type_id) if self.category_type_id else None
+    def resolve_category(self, info, **kwargs):
+        return ModuleCategory.objects.get(pk=self.category_id) if self.category_id else None
 
     @staticmethod
     def resolve_snapshots(parent, info, **kwargs):
diff --git a/server/books/schema/nodes/module_category.py b/server/books/schema/nodes/module_category.py
index 165d8e83..add10b08 100644
--- a/server/books/schema/nodes/module_category.py
+++ b/server/books/schema/nodes/module_category.py
@@ -2,12 +2,12 @@ from graphene import relay
 from graphene import relay
 from graphene_django import DjangoObjectType
 
-from books.models import ModuleLevel
+from books.models import ModuleCategory
 
 
-class ModuleLevelNode(DjangoObjectType):
+class ModuleCategoryNode(DjangoObjectType):
     class Meta:
-        model = ModuleLevel
+        model = ModuleCategory
         interfaces = (relay.Node,)
         only_fields = [
             "id",
diff --git a/server/books/schema/nodes/module_category_type.py b/server/books/schema/nodes/module_level.py
similarity index 66%
rename from server/books/schema/nodes/module_category_type.py
rename to server/books/schema/nodes/module_level.py
index 59159a0e..165d8e83 100644
--- a/server/books/schema/nodes/module_category_type.py
+++ b/server/books/schema/nodes/module_level.py
@@ -2,12 +2,12 @@ from graphene import relay
 from graphene import relay
 from graphene_django import DjangoObjectType
 
-from books.models import ModuleType
+from books.models import ModuleLevel
 
 
-class ModuleCategoryTypeNode(DjangoObjectType):
+class ModuleLevelNode(DjangoObjectType):
     class Meta:
-        model = ModuleType
+        model = ModuleLevel
         interfaces = (relay.Node,)
         only_fields = [
             "id",
diff --git a/server/books/schema/queries.py b/server/books/schema/queries.py
index 7793140b..1de8e190 100644
--- a/server/books/schema/queries.py
+++ b/server/books/schema/queries.py
@@ -7,9 +7,9 @@ from core.logger import get_logger
 from .connections import TopicConnection, ModuleConnection
 from .nodes import ContentBlockNode, ChapterNode, ModuleNode, NotFoundFailure, SnapshotNode, \
     TopicOr404Node
-from .nodes.module_category import ModuleLevelNode
-from .nodes.module_category_type import ModuleCategoryTypeNode
-from ..models import Book, Topic, Module, Chapter, Snapshot, ModuleLevel, ModuleType
+from .nodes.module_level import ModuleLevelNode
+from .nodes.module_category import ModuleCategoryNode
+from ..models import Book, Topic, Module, Chapter, Snapshot, ModuleLevel, ModuleCategory
 
 logger = get_logger(__name__)
 
@@ -30,8 +30,8 @@ class BookQuery(object):
     module_level = graphene.Field(ModuleLevelNode, id=graphene.ID(required=True))
     module_levels = graphene.List(ModuleLevelNode)
 
-    module_category_type= graphene.Field(ModuleCategoryTypeNode, id=graphene.ID(required=True))
-    module_category_types = graphene.List(ModuleCategoryTypeNode)
+    module_category = graphene.Field(ModuleCategoryNode, id=graphene.ID(required=True))
+    module_categories = graphene.List(ModuleCategoryNode)
 
     def resolve_books(self, *args, **kwargs):
         return Book.objects.filter(**kwargs).live()
@@ -92,18 +92,17 @@ class BookQuery(object):
     def resolve_module_levels(self, *args, **kwargs):
         return ModuleLevel.objects.filter(**kwargs)
 
-    def resolve_module_category_type(self, info, **kwargs):
+    def resolve_module_category(self, info, **kwargs):
         id = kwargs.get('id')
         try:
             if id is not None:
-                module_category_type = get_object(Module, id)
-                return module_category_type
+                return get_object(Module, id)
 
         except Module.DoesNotExist:
             return None
 
-    def resolve_module_category_types(self, *args, **kwargs):
-        return ModuleType.objects.filter(**kwargs)
+    def resolve_module_categories(self, *args, **kwargs):
+        return ModuleCategory.objects.filter(**kwargs)
 
 
 
diff --git a/server/books/wagtail_hooks.py b/server/books/wagtail_hooks.py
index 570e006c..00630ef5 100644
--- a/server/books/wagtail_hooks.py
+++ b/server/books/wagtail_hooks.py
@@ -5,15 +5,15 @@ from wagtail.contrib.modeladmin.options import (
 )
 from wagtail import hooks
 
-from .models.module import ModuleLevel, ModuleType, Module
+from .models.module import ModuleLevel, ModuleCategory, Module
 from django.utils.translation import gettext_lazy as _
 
 
 class ModuleAdmin(ModelAdmin):
     model = Module
-    list_display = ("title", "meta_title", "level", "category_type")
+    list_display = ("title", "meta_title", "level", "category")
     search_fields = ("title", "meta_title")
-    list_filter = ("level", "category_type")
+    list_filter = ("level", "category")
 
 
 class ModuleLevelAdmin(ModelAdmin):
@@ -22,8 +22,8 @@ class ModuleLevelAdmin(ModelAdmin):
     ordering = ("name",)
 
 
-class ModuleTypeAdmin(ModelAdmin):
-    model = ModuleType
+class ModuleCategoryAdmin(ModelAdmin):
+    model = ModuleCategory
     list_display = ("name",)
     ordering = ("name",)
     inspect_view_fields = ("name",)
@@ -34,7 +34,7 @@ class InstrumentGroup(ModelAdminGroup):
     items = (
         ModuleAdmin,
         ModuleLevelAdmin,
-        ModuleTypeAdmin,
+        ModuleCategoryAdmin,
     )