diff --git a/server/notes/inputs.py b/server/notes/inputs.py
index a764392f..d1f1c72c 100644
--- a/server/notes/inputs.py
+++ b/server/notes/inputs.py
@@ -16,7 +16,7 @@ class UpdateNoteArgument(InputObjectType):
 
 
 class AddHighlightArgument(InputObjectType):
-    content_block = graphene.String(required=True)
+    page = graphene.String(required=True)
     content_index = graphene.Int(required=True)
     content_uuid = graphene.UUID(required=True)
     paragraph_index = graphene.Int(required=True)
diff --git a/server/notes/models.py b/server/notes/models.py
index 72b49d75..1a2e9825 100644
--- a/server/notes/models.py
+++ b/server/notes/models.py
@@ -1,8 +1,8 @@
 from django.db import models
 
 # Create your models here.
-from core.wagtail_utils import StrictHierarchyPage
 from users.models import User
+from wagtail.models import Page
 
 
 class Note(models.Model):
@@ -55,9 +55,7 @@ class InstrumentBookmark(Bookmark):
 
 class Highlight(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE)
-    content_block = models.ForeignKey(
-        "books.ContentBlock", on_delete=models.CASCADE, related_name="highlights"
-    )
+    page = models.ForeignKey(Page, on_delete=models.CASCADE, related_name="highlights")
     # see highlight.ts for comments
     content_index = models.IntegerField()
     content_uuid = models.UUIDField()
diff --git a/server/notes/mutations.py b/server/notes/mutations.py
index 02c92c28..8dc75134 100644
--- a/server/notes/mutations.py
+++ b/server/notes/mutations.py
@@ -285,7 +285,7 @@ class AddHighlight(relay.ClientIDMutation):
         if highlight is None:
             raise Exception("No highlight provided, should not happen")
 
-        content_block_id = highlight.get("content_block")
+        page_id = highlight.get("page")
         content_index = highlight.get("content_index")
         content_uuid = highlight.get("content_uuid")
         paragraph_index = highlight.get("paragraph_index")
@@ -294,10 +294,16 @@ class AddHighlight(relay.ClientIDMutation):
         selection_length = highlight.get("selection_length")
         color = highlight.get("color")
 
-        content_block = get_object(ContentBlock, content_block_id)
+        page_type, page_id = from_global_id(page_id)
+        if page_type == "ContentBlockNode":
+            page = ContentBlock.objects.get(id=page_id)
+        elif page_type == "InstrumentNode":
+            page = BasicKnowledge.objects.get(id=page_id)
+        else:
+            raise Exception("wrong type")
 
         new_highlight = Highlight.objects.create(
-            content_block=content_block,
+            page=page,
             user=user,
             content_index=content_index,
             content_uuid=content_uuid,
diff --git a/server/notes/schema.py b/server/notes/schema.py
index eeba20bf..f5fb7ef1 100644
--- a/server/notes/schema.py
+++ b/server/notes/schema.py
@@ -1,14 +1,15 @@
 import graphene
+from basicknowledge.queries import InstrumentNode
+from books.schema.nodes.content import ContentBlockNode
 from graphene import relay
 from graphene_django import DjangoObjectType
-
 from notes.models import (
-    Highlight,
-    Note,
-    ContentBlockBookmark,
-    ModuleBookmark,
     ChapterBookmark,
+    ContentBlockBookmark,
+    Highlight,
     InstrumentBookmark,
+    ModuleBookmark,
+    Note,
 )
 
 
@@ -64,7 +65,14 @@ class InstrumentBookmarkNode(DjangoObjectType):
         interfaces = (relay.Node,)
 
 
+class HighlightableNode(graphene.Union):
+    class Meta:
+        types = (ContentBlockNode, InstrumentNode)
+
+
 class HighlightNode(DjangoObjectType):
+    page = graphene.Field(HighlightableNode)
+
     class Meta:
         model = Highlight
         fields = "__all__"
diff --git a/server/schema.graphql b/server/schema.graphql
index a1dc5c6b..b6b4cd0e 100644
--- a/server/schema.graphql
+++ b/server/schema.graphql
@@ -599,6 +599,7 @@ type InstrumentNode implements Node {
   bookmarks: [InstrumentBookmarkNode]
   type: InstrumentTypeNode
   language: String
+  highlights: [HighlightNode]
 }
 
 type InstrumentTypeNode implements Node {
@@ -622,7 +623,7 @@ type HighlightNode implements Node {
   """The ID of the object"""
   id: ID!
   user: PrivateUserNode!
-  contentBlock: ContentBlockNode!
+  page: HighlightableNode
   contentIndex: Int!
   contentUuid: UUID!
   paragraphIndex: Int!
@@ -633,6 +634,8 @@ type HighlightNode implements Node {
   color: String!
 }
 
+union HighlightableNode = ContentBlockNode | InstrumentNode
+
 type SnapshotObjectiveGroupNode implements Node {
   """The ID of the object"""
   id: ID!
@@ -1150,7 +1153,7 @@ input AddHighlightInput {
 }
 
 input AddHighlightArgument {
-  contentBlock: String!
+  page: String!
   contentIndex: Int!
   contentUuid: UUID!
   paragraphIndex: Int!