diff --git a/backend/app/routers/courses.py b/backend/app/routers/courses.py
index ffbe130..d7c61c1 100644
--- a/backend/app/routers/courses.py
+++ b/backend/app/routers/courses.py
@@ -1057,6 +1057,43 @@ def get_scorm_status(
     return {"completed": progress.status == "completed" if progress else False}
 
 
+@router.get("/{course_id}/lessons/{lesson_id}/scorm/data")
+def get_scorm_data(
+    course_id: int,
+    lesson_id: int,
+    current_user: User = Depends(get_current_user),
+):
+    """Get saved SCORM runtime data for this user/lesson."""
+    import json
+    try:
+        import redis as redis_lib
+        r = redis_lib.from_url(settings.REDIS_URL, decode_responses=True)
+        key = f"scorm_data:{current_user.id}:{course_id}:{lesson_id}"
+        data = r.get(key)
+        return json.loads(data) if data else {}
+    except Exception:
+        return {}
+
+
+@router.put("/{course_id}/lessons/{lesson_id}/scorm/data")
+def save_scorm_data(
+    course_id: int,
+    lesson_id: int,
+    data: dict,
+    current_user: User = Depends(get_current_user),
+):
+    """Save SCORM runtime data for this user/lesson. Persists bookmarks, scores, and state."""
+    import json
+    try:
+        import redis as redis_lib
+        r = redis_lib.from_url(settings.REDIS_URL, decode_responses=True)
+        key = f"scorm_data:{current_user.id}:{course_id}:{lesson_id}"
+        r.set(key, json.dumps(data), ex=60 * 60 * 24 * 90)  # 90 day expiry
+        return {"saved": True}
+    except Exception:
+        raise HTTPException(status_code=500, detail="Failed to save SCORM data")
+
+
 # ── Enrollment ───────────────────────────────────────────────────────
 
 @router.get("/{course_id}/enrollees")
diff --git a/frontend/src/pages/CourseDetailPage.jsx b/frontend/src/pages/CourseDetailPage.jsx
index 2fd665c..053d711 100644
--- a/frontend/src/pages/CourseDetailPage.jsx
+++ b/frontend/src/pages/CourseDetailPage.jsx
@@ -9,73 +9,68 @@ import 'katex/dist/katex.min.css'
 import { useAuth } from '../context/AuthContext'
 import api from '../api/client'
 
-// ── SCORM Player with API shim ──────────────────────────────────────
+// ── SCORM Player with API shim + persistence ───────────────────────
 function ScormPlayer({ src, title, lessonId, courseId, onComplete }) {
   const iframeRef = useRef(null)
   const dataRef = useRef({})
   const completedRef = useRef(false)
+  const [ready, setReady] = useState(false)
 
-  const setupApi = useCallback(() => {
+  // Load saved SCORM data from backend before exposing API
+  useEffect(() => {
+    api.get(`/courses/${courseId}/lessons/${lessonId}/scorm/data`)
+      .then(res => { dataRef.current = res.data || {} })
+      .catch(() => {})
+      .finally(() => setReady(true))
+  }, [courseId, lessonId])
+
+  // Save SCORM data to backend (debounced — called on Commit/Finish/Terminate)
+  const persist = useCallback(() => {
+    api.put(`/courses/${courseId}/lessons/${lessonId}/scorm/data`, dataRef.current).catch(() => {})
+  }, [courseId, lessonId])
+
+  const checkComplete = useCallback(() => {
     const data = dataRef.current
+    const s12 = data["cmi.core.lesson_status"]
+    const s04 = data["cmi.completion_status"]
+    if ((s12 === "completed" || s12 === "passed" || s04 === "completed") && !completedRef.current) {
+      completedRef.current = true
+      onComplete?.()
+    }
+  }, [onComplete])
+
+  useEffect(() => {
+    if (!ready) return
+    const data = dataRef.current
+
     // SCORM 1.2 API
-    const API = {
-      LMSInitialize: () => { return "true" },
-      LMSFinish: () => {
-        const status = data["cmi.core.lesson_status"]
-        if ((status === "completed" || status === "passed") && !completedRef.current) {
-          completedRef.current = true
-          onComplete?.()
-        }
-        return "true"
-      },
-      LMSGetValue: (key) => data[key] || "",
+    window.API = {
+      LMSInitialize: () => "true",
+      LMSFinish: () => { persist(); checkComplete(); return "true" },
+      LMSGetValue: (key) => data[key] ?? "",
       LMSSetValue: (key, val) => { data[key] = val; return "true" },
-      LMSCommit: () => {
-        const status = data["cmi.core.lesson_status"]
-        if ((status === "completed" || status === "passed") && !completedRef.current) {
-          completedRef.current = true
-          onComplete?.()
-        }
-        return "true"
-      },
+      LMSCommit: () => { persist(); checkComplete(); return "true" },
       LMSGetLastError: () => "0",
       LMSGetErrorString: () => "No error",
       LMSGetDiagnostic: () => "No diagnostic",
     }
+
     // SCORM 2004 API
-    const API_1484_11 = {
+    window.API_1484_11 = {
       Initialize: () => "true",
-      Terminate: () => {
-        const status = data["cmi.completion_status"]
-        if ((status === "completed") && !completedRef.current) {
-          completedRef.current = true
-          onComplete?.()
-        }
-        return "true"
-      },
-      GetValue: (key) => data[key] || "",
+      Terminate: () => { persist(); checkComplete(); return "true" },
+      GetValue: (key) => data[key] ?? "",
       SetValue: (key, val) => { data[key] = val; return "true" },
-      Commit: () => {
-        const status = data["cmi.completion_status"]
-        if ((status === "completed") && !completedRef.current) {
-          completedRef.current = true
-          onComplete?.()
-        }
-        return "true"
-      },
+      Commit: () => { persist(); checkComplete(); return "true" },
       GetLastError: () => "0",
       GetErrorString: () => "No error",
       GetDiagnostic: () => "No diagnostic",
     }
-    // Expose on window so iframe content can find it by walking up parent frames
-    window.API = API
-    window.API_1484_11 = API_1484_11
-  }, [onComplete])
 
-  useEffect(() => {
-    setupApi()
-    return () => { delete window.API; delete window.API_1484_11 }
-  }, [setupApi])
+    return () => { persist(); delete window.API; delete window.API_1484_11 }
+  }, [ready, persist, checkComplete])
+
+  if (!ready) return <div className="loading"><div className="spinner" /> Loading SCORM content...</div>
 
   return (
     <iframe