diff --git a/server/notes/schema.py b/server/notes/schema.py
index 61e80cf9..0bd9776b 100644
--- a/server/notes/schema.py
+++ b/server/notes/schema.py
@@ -22,7 +22,7 @@ logger = get_logger(__name__)
 
 content_dict = {
         'assignment': 'Auftrag',
-        'basic_knowledge': 'dsafasdfasdf',
+        'basic_knowledge': '',
         'survey': 'Übung',
         'image_block': 'Bild',
         'link_block': 'Link',
@@ -37,30 +37,49 @@ content_dict = {
         'cms_document_block': 'Dokument',
         }
 
+from collections import deque
+
+def find_content_bfs(data, target_id):
+    """
+    breadth-first search to find an object by its ID in a nested dictionary structure
+    """
+    # Initialize a queue with the initial data list
+    queue = deque(data)
+
+    # Traverse through the data using BFS
+    while queue:
+        current = queue.popleft()
+
+        # Check if the current dictionary has the target_id
+        if current.get("id", "") == target_id:
+            return current
+
+        # If 'value' in current and it is a list, extend the queue with the items in 'value'
+        if isinstance(current.get("value"), list):
+            queue.extend(current["value"])
+
+    return None  # If no matching ID is found
+
 
 def find_content(content_list, bookmark):
-    found = (content for content in content_list if uuid.UUID(content['id']) == bookmark.uuid)
-    content = next(found, None)
-    if content is None:
-        for c in content_list:
-            if c.get('id') == bookmark.uuid:
-                return c.get('value').get('text', '')
-            return c.get('value').get('text', '')
+    content = find_content_bfs(content_list, str(bookmark.uuid))
+    if not content:
+        logger.warn(f"Content not found: {bookmark.uuid}")
         return ''
-    if content['type'] in ['text_block', 'subtitle', 'solution']:
+
+    if content['type'] in ['text_block', 'subtitle', 'solution', 'section_title']:
         return content['value'].get('text', '')
+
     if content['type'] in ['basic_knowledge']:
-        if type(content['value']) is dict:
-            description = content['value'].get('description', '')
-            if not description:
-                try:
-                    return BasicKnowledge.objects.get(pk=content['value']['basic_knowledge']).title
-                except BasicKnowledge.DoesNotExist:
-                    return ''
-            else:
-                return description
-        else:
-            logger.warn(f"Content value is not a dict: {content['value']}")
+        description = content['value'].get('description', '')
+        if not description:
+            try:
+                return BasicKnowledge.objects.get(pk=content['value']['basic_knowledge']).title
+            except BasicKnowledge.DoesNotExist:
+                return ''
+        return description
+    if content_dict.get(content['type'], '') == "":
+        logger.warn(f"Content type not found: {content['type']}")
     return content_dict.get(content['type'], '')
 
 class NoteNode(DjangoObjectType):
diff --git a/server/notes/tests/test_bookmarkcontent.py b/server/notes/tests/test_bookmarkcontent.py
new file mode 100644
index 00000000..a1d354b8
--- /dev/null
+++ b/server/notes/tests/test_bookmarkcontent.py
@@ -0,0 +1,87 @@
+import json
+
+from django.test import TestCase
+
+from books.factories import InstrumentFactory, ContentBlockFactory, ModuleFactory
+from notes.models import InstrumentBookmark
+from notes.schema import find_content
+from users.models import User
+from users.services import create_users
+
+
+class TestGetBookmarkContent(TestCase):
+    def setUp(self):
+        create_users()
+        self.student1 = User.objects.get(username='student1')
+        self.instrument = InstrumentFactory(title="My Instrument", slug='instrument-slug')
+
+    def test_content_from_content_list_item(self):
+        content_list = [
+            {
+                "id": "45c5d9e7-233b-4ec7-a539-4136f2f969a4",
+                "type": "content_list_item",
+                "value": [
+                    {
+                        "id": "4eb6a9ec-576a-4bec-8eb7-798ac21e88cd",
+                        "type": "text_block",
+                        "value": {"text": "<p>Schauen Sie sich die</p>"}
+                    },
+                    {
+                        "id": "718bee9a-5f92-4e3d-b7f8-aa63b8f2497e",
+                        "type": "link_block",
+                        "value": {"url": "https://skilM2_A2_Studie.pdf", "text": "Studie anzeigen"}
+                    }
+                ]
+            },
+            {
+                "id": "6a72b706-5ad7-4c8b-9fa1-e89909a2a5e6",
+                "type": "content_list_item",
+                "value": [
+                    {
+                        "id": "b7cd58c7-3131-4e3c-a51a-cd0026be03f8",
+                        "type": "assignment",
+                        "value": {"assignment_id": 204}
+                    }
+                ]
+            }
+        ]
+
+        bookmark = InstrumentBookmark.objects.create(
+            instrument=self.instrument,
+            uuid='4eb6a9ec-576a-4bec-8eb7-798ac21e88cd',
+            user=self.student1
+        )
+        content = find_content(content_list, bookmark)
+
+        self.assertEqual("<p>Schauen Sie sich die</p>", content)
+
+    def test_content_from_instrument(self):
+        self.instrument = InstrumentFactory(title="My Instrument", slug='instrument-slug-sdfe')
+
+        content_list = [{'id': '6dd39d83-e442-4f3c-8d3f-e7e8026b0c4b',
+                         'type': 'basic_knowledge',
+                         'value': {'description': '', 'basic_knowledge': self.instrument.id}}
+                        ]
+
+        bookmark = InstrumentBookmark.objects.create(
+            instrument=self.instrument,
+            uuid='6dd39d83-e442-4f3c-8d3f-e7e8026b0c4b',
+            user=self.student1
+        )
+        content = find_content(content_list, bookmark)
+        self.assertEqual("My Instrument", content)
+
+    def test_content_from_thinglink_block(self):
+        self.instrument = InstrumentFactory(title="My Instrument", slug='instrument-slug-sdfe')
+
+        content_list = [{'id': 'f3f80b35-9098-4eeb-a149-3dc0318208cb',
+                          'type': 'thinglink_block',
+                          'value': {'id': '1251174983242088451'}}]
+
+        bookmark = InstrumentBookmark.objects.create(
+            instrument=self.instrument,
+            uuid='f3f80b35-9098-4eeb-a149-3dc0318208cb',
+            user=self.student1
+        )
+        content = find_content(content_list, bookmark)
+        self.assertEqual("Infografik", content)
diff --git a/server/notes/tests/test_find_content.py b/server/notes/tests/test_find_content.py
new file mode 100644
index 00000000..0fb7c237
--- /dev/null
+++ b/server/notes/tests/test_find_content.py
@@ -0,0 +1,70 @@
+import json
+
+from django.test import TestCase
+
+from books.factories import InstrumentFactory, ContentBlockFactory, ModuleFactory
+from notes.models import InstrumentBookmark
+from notes.schema import find_content, find_content_bfs
+from users.models import User
+from users.services import create_users
+
+
+class TestFindContentBfs(TestCase):
+    def setUp(self):
+        self.data = [
+            {
+                "id": "45c5d9e7-233b-4ec7-a539-4136f2f969a4",
+                "type": "content_list_item",
+                "value": [
+                    {
+                        "id": "4eb6a9ec-576a-4bec-8eb7-798ac21e88cd",
+                        "type": "text_block",
+                        "value": {"text": "<p>Schauen Sie sich die</p>"}
+                    },
+                    {
+                        "id": "718bee9a-5f92-4e3d-b7f8-aa63b8f2497e",
+                        "type": "link_block",
+                        "value": {"url": "https://skilM2_A2_Studie.pdf", "text": "Studie anzeigen"}
+                    }
+                ]
+            },
+            {
+                "id": "6a72b706-5ad7-4c8b-9fa1-e89909a2a5e6",
+                "type": "content_list_item",
+                "value": [
+                    {
+                        "id": "b7cd58c7-3131-4e3c-a51a-cd0026be03f8",
+                        "type": "assignment",
+                        "value": {"assignment_id": 204}
+                    }
+                ]
+            }
+        ]
+
+    def test_content_from_content_list_item_sub_item(self):
+        result = find_content_bfs(self.data, "4eb6a9ec-576a-4bec-8eb7-798ac21e88cd")
+
+        self.assertEqual( {
+                        "id": "4eb6a9ec-576a-4bec-8eb7-798ac21e88cd",
+                        "type": "text_block",
+                        "value": {"text": "<p>Schauen Sie sich die</p>"}
+                    }, result)
+
+    def test_content_from_content_list_item(self):
+        result = find_content_bfs(self.data, "45c5d9e7-233b-4ec7-a539-4136f2f969a4")
+        self.assertEqual(  {
+                "id": "45c5d9e7-233b-4ec7-a539-4136f2f969a4",
+                "type": "content_list_item",
+                "value": [
+                    {
+                        "id": "4eb6a9ec-576a-4bec-8eb7-798ac21e88cd",
+                        "type": "text_block",
+                        "value": {"text": "<p>Schauen Sie sich die</p>"}
+                    },
+                    {
+                        "id": "718bee9a-5f92-4e3d-b7f8-aa63b8f2497e",
+                        "type": "link_block",
+                        "value": {"url": "https://skilM2_A2_Studie.pdf", "text": "Studie anzeigen"}
+                    }
+                ]
+            }, result)