diff --git a/backend/app/routers/courses.py b/backend/app/routers/courses.py
index 26d8743..d38a005 100644
--- a/backend/app/routers/courses.py
+++ b/backend/app/routers/courses.py
@@ -28,9 +28,6 @@ router = APIRouter()
 class CourseCreate(BaseModel):
     title: str
     description: str | None = None
-    category: str | None = None
-    thumbnail_url: str | None = None
-    requires_subscription: int = 0
 
 
 class CourseUpdate(BaseModel):
@@ -44,13 +41,13 @@ class CourseUpdate(BaseModel):
 class ModuleCreate(BaseModel):
     title: str
     description: str | None = None
-    sort_order: int | None = None
+    position: int | None = None
 
 
 class ModuleUpdate(BaseModel):
     title: str | None = None
     description: str | None = None
-    sort_order: int | None = None
+    position: int | None = None
 
 
 class ModuleReorder(BaseModel):
@@ -64,7 +61,7 @@ class LessonCreate(BaseModel):
     video_url: str | None = None
     duration_minutes: int | None = None
     is_required: int = 1
-    sort_order: int | None = None
+    position: int | None = None
 
 
 class LessonUpdate(BaseModel):
@@ -75,7 +72,7 @@ class LessonUpdate(BaseModel):
     video_provider: str | None = None
     duration_minutes: int | None = None
     is_required: int | None = None
-    sort_order: int | None = None
+    position: int | None = None
 
 
 class ProgressUpdate(BaseModel):
@@ -128,9 +125,6 @@ def create_course(
     course = Course(
         title=data.title,
         description=data.description,
-        category=data.category,
-        thumbnail_url=data.thumbnail_url,
-        requires_subscription=data.requires_subscription,
         user_id=current_user.id,
         status="draft",
     )
@@ -186,9 +180,9 @@ def list_courses(
             "id": course.id,
             "title": course.title,
             "description": course.description,
-            "category": course.category,
+
             "status": course.status,
-            "thumbnail_url": course.thumbnail_url,
+            "thumbnail_path": course.thumbnail_path,
             "requires_subscription": course.requires_subscription,
             "user_id": course.user_id,
             "creator_name": user_cache[course.user_id],
@@ -242,8 +236,8 @@ def list_published_courses(
             "id": course.id,
             "title": course.title,
             "description": course.description,
-            "category": course.category,
-            "thumbnail_url": course.thumbnail_url,
+
+            "thumbnail_path": course.thumbnail_path,
             "requires_subscription": course.requires_subscription,
             "user_id": course.user_id,
             "creator_name": user_cache[course.user_id],
@@ -275,8 +269,8 @@ def my_courses(
             "id": course.id,
             "title": course.title,
             "description": course.description,
-            "category": course.category,
-            "thumbnail_url": course.thumbnail_url,
+
+            "thumbnail_path": course.thumbnail_path,
             "status": course.status,
             "enrollment_id": enrollment.id,
             "progress_pct": enrollment.progress_pct,
@@ -318,7 +312,7 @@ def get_course(
     modules = (
         db.query(CourseModule)
         .filter(CourseModule.course_id == course_id)
-        .order_by(CourseModule.sort_order, CourseModule.id)
+        .order_by(CourseModule.position, CourseModule.id)
         .all()
     )
     modules_out = []
@@ -326,14 +320,14 @@ def get_course(
         lessons = (
             db.query(CourseLesson)
             .filter(CourseLesson.module_id == mod.id)
-            .order_by(CourseLesson.sort_order, CourseLesson.id)
+            .order_by(CourseLesson.position, CourseLesson.id)
             .all()
         )
         modules_out.append({
             "id": mod.id,
             "title": mod.title,
             "description": mod.description,
-            "sort_order": mod.sort_order,
+            "position": mod.position,
             "lessons": [
                 {
                     "id": les.id,
@@ -345,7 +339,7 @@ def get_course(
                     "file_path": les.file_path,
                     "duration_minutes": les.duration_minutes,
                     "is_required": les.is_required,
-                    "sort_order": les.sort_order,
+                    "position": les.position,
                     "bbb_meeting_id": les.bbb_meeting_id,
                 }
                 for les in lessons
@@ -388,9 +382,8 @@ def get_course(
         "id": course.id,
         "title": course.title,
         "description": course.description,
-        "category": course.category,
         "status": course.status,
-        "thumbnail_url": course.thumbnail_url,
+        "thumbnail_path": course.thumbnail_path,
         "requires_subscription": course.requires_subscription,
         "user_id": course.user_id,
         "creator_name": creator_name,
@@ -476,11 +469,11 @@ async def upload_thumbnail(
     with open(file_path, "wb") as f:
         f.write(contents)
 
-    course.thumbnail_url = f"/uploads/course_thumbnails/{filename}"
+    course.thumbnail_path = f"/uploads/course_thumbnails/{filename}"
     course.updated_at = datetime.utcnow()
     db.commit()
 
-    return {"thumbnail_url": course.thumbnail_url}
+    return {"thumbnail_path": course.thumbnail_path}
 
 
 # ── Module CRUD ──────────────────────────────────────────────────────
@@ -495,21 +488,21 @@ def create_module(
     """Add a module to a course (creator or admin)."""
     _course_owner_or_admin(course_id, current_user, db)
 
-    # Auto sort_order if not provided
-    sort_order = data.sort_order
-    if sort_order is None:
+    # Auto position if not provided
+    position = data.position
+    if position is None:
         max_order = (
-            db.query(func.max(CourseModule.sort_order))
+            db.query(func.max(CourseModule.position))
             .filter(CourseModule.course_id == course_id)
             .scalar()
         )
-        sort_order = (max_order or 0) + 1
+        position = (max_order or 0) + 1
 
     module = CourseModule(
         course_id=course_id,
         title=data.title,
         description=data.description,
-        sort_order=sort_order,
+        position=position,
     )
     db.add(module)
     db.commit()
@@ -519,7 +512,7 @@ def create_module(
         "course_id": module.course_id,
         "title": module.title,
         "description": module.description,
-        "sort_order": module.sort_order,
+        "position": module.position,
     }
 
 
@@ -548,7 +541,7 @@ def update_module(
         "id": module.id,
         "title": module.title,
         "description": module.description,
-        "sort_order": module.sort_order,
+        "position": module.position,
     }
 
 
@@ -588,7 +581,7 @@ def reorder_modules(
             .first()
         )
         if module:
-            module.sort_order = idx + 1
+            module.position = idx + 1
     db.commit()
     return {"reordered": True, "count": len(data.module_ids)}
 
@@ -614,15 +607,15 @@ def create_lesson(
     if not module:
         raise HTTPException(status_code=404, detail="Module not found")
 
-    # Auto sort_order if not provided
-    sort_order = data.sort_order
-    if sort_order is None:
+    # Auto position if not provided
+    position = data.position
+    if position is None:
         max_order = (
-            db.query(func.max(CourseLesson.sort_order))
+            db.query(func.max(CourseLesson.position))
             .filter(CourseLesson.module_id == module_id)
             .scalar()
         )
-        sort_order = (max_order or 0) + 1
+        position = (max_order or 0) + 1
 
     video_provider = _detect_video_provider(data.video_url)
 
@@ -635,7 +628,7 @@ def create_lesson(
         video_provider=video_provider,
         duration_minutes=data.duration_minutes,
         is_required=data.is_required,
-        sort_order=sort_order,
+        position=position,
     )
     db.add(lesson)
     db.commit()
@@ -647,7 +640,7 @@ def create_lesson(
         "lesson_type": lesson.lesson_type,
         "video_url": lesson.video_url,
         "video_provider": lesson.video_provider,
-        "sort_order": lesson.sort_order,
+        "position": lesson.position,
     }
 
 
@@ -685,7 +678,7 @@ def update_lesson(
         "lesson_type": lesson.lesson_type,
         "video_url": lesson.video_url,
         "video_provider": lesson.video_provider,
-        "sort_order": lesson.sort_order,
+        "position": lesson.position,
     }
 
 
diff --git a/frontend/src/pages/CoursesPage.jsx b/frontend/src/pages/CoursesPage.jsx
index 7448368..8df325f 100644
--- a/frontend/src/pages/CoursesPage.jsx
+++ b/frontend/src/pages/CoursesPage.jsx
@@ -111,9 +111,9 @@ export default function CoursesPage() {
         <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', flexWrap: 'wrap', gap: 8 }}>
           <h2 style={{ marginBottom: 0 }}>Courses</h2>
           <div style={{ display: 'flex', gap: 4 }}>
-            <button className={`btn btn-sm ${tab === 'browse' ? 'btn-primary' : 'btn-secondary'}`} onClick={() => setTab('browse')}>Browse Courses</button>
-            <button className={`btn btn-sm ${tab === 'enrolled' ? 'btn-primary' : 'btn-secondary'}`} onClick={() => setTab('enrolled')}>My Courses</button>
-            <button className={`btn btn-sm ${tab === 'created' ? 'btn-primary' : 'btn-secondary'}`} onClick={() => setTab('created')}>My Created</button>
+            <button className={`btn btn-sm ${tab === 'browse' ? 'btn-primary' : 'btn-secondary'}`} onClick={() => setTab('browse')}>Browse</button>
+            <button className={`btn btn-sm ${tab === 'enrolled' ? 'btn-primary' : 'btn-secondary'}`} onClick={() => setTab('enrolled')}>Enrolled</button>
+            <button className={`btn btn-sm ${tab === 'created' ? 'btn-primary' : 'btn-secondary'}`} onClick={() => setTab('created')}>Created by Me</button>
           </div>
         </div>
       </div>