diff --git a/controllers/contentControllers/exercise.js b/controllers/contentControllers/exercise.js
index eef569a..f3230f5 100644
--- a/controllers/contentControllers/exercise.js
+++ b/controllers/contentControllers/exercise.js
@@ -221,7 +221,7 @@ export const getExerciseByLevelId = async (req, res) => {
         if (exerciseData.multipleChoices) {
           exerciseData.multipleChoices = exerciseData.multipleChoices.map(
             (choice) => {
-              const { ANSWER_KEY, ...rest } = choice.dataValues; // Exclude ANSWER_KEY
+              const { ANSWER_KEY, ...rest } = choice.dataValues;
               return rest;
             }
           );
@@ -231,10 +231,7 @@ export const getExerciseByLevelId = async (req, res) => {
       } else if (questionType === "MPQ") {
         if (exerciseData.matchingPairs) {
           exerciseData.matchingPairs = exerciseData.matchingPairs.map(
-            (pair) => {
-              const { LEFT_PAIR, RIGHT_PAIR, ...rest } = pair.dataValues; // Exclude LEFT_PAIR, RIGHT_PAIR
-              return rest;
-            }
+            (pair) => pair.dataValues
           );
         }
         delete exerciseData.multipleChoices;
@@ -242,7 +239,7 @@ export const getExerciseByLevelId = async (req, res) => {
       } else if (questionType === "TFQ") {
         if (exerciseData.trueFalse) {
           exerciseData.trueFalse = exerciseData.trueFalse.map((tf) => {
-            const { IS_TRUE, ...rest } = tf.dataValues; // Exclude IS_TRUE
+            const { IS_TRUE, ...rest } = tf.dataValues;
             return rest;
           });
         }
diff --git a/controllers/learningControllers/stdExercise.js b/controllers/learningControllers/stdExercise.js
index a2c46cd..cefc9b8 100644
--- a/controllers/learningControllers/stdExercise.js
+++ b/controllers/learningControllers/stdExercise.js
@@ -98,3 +98,7 @@ export const stdAnswerExercise = async (req, res, next) => {
     );
   }
 };
+
+export const getStudentAnswersByStdLearningId = async (req, res) => {
+  
+}
\ No newline at end of file
diff --git a/controllers/learningControllers/stdLearning.js b/controllers/learningControllers/stdLearning.js
index 7c57d4f..14e7399 100644
--- a/controllers/learningControllers/stdLearning.js
+++ b/controllers/learningControllers/stdLearning.js
@@ -34,13 +34,18 @@ export const createStdLearning = async (req, res) => {
     return response(401, null, "User not authenticated", res);
   }
 
-  if (!ID_LEVEL) {
-    return response(400, null, "Level ID is required", res);
-  }
-
   const ID = req.user.ID;
 
   try {
+    if (req.stdLearning) {
+      return response(
+        200,
+        req.stdLearning,
+        "Student Learning data found and reused",
+        res
+      );
+    }
+
     const level = await models.Level.findByPk(ID_LEVEL);
     if (!level) {
       return response(404, null, "Level not found", res);
@@ -214,7 +219,9 @@ export const learningScoreByStdLearningId = async (req, res) => {
         ? stdLearning.learningUser.students.NISN
         : null,
       ID_LEVEL: stdLearning.level ? stdLearning.level.ID_LEVEL : null,
-      CURRENT_LEVEL_NAME: stdLearning.level ? stdLearning.level.NAME_LEVEL : null,
+      CURRENT_LEVEL_NAME: stdLearning.level
+        ? stdLearning.level.NAME_LEVEL
+        : null,
       SCORE: stdLearning.SCORE,
       NEXT_LEARNING: stdLearning.NEXT_LEARNING,
       NEXT_LEARNING_NAME: stdLearning.nextLevel.NAME_LEVEL,
diff --git a/middlewares/checkStdLearning.js b/middlewares/checkStdLearning.js
new file mode 100644
index 0000000..200c7a4
--- /dev/null
+++ b/middlewares/checkStdLearning.js
@@ -0,0 +1,35 @@
+import models from "../models/index.js";
+import response from "../response.js";
+
+export const checkStdLearning = async (req, res, next) => {
+  const { ID_LEVEL } = req.body;
+
+  if (!req.user) {
+    return response(401, null, "User not authenticated", res);
+  }
+
+  if (!ID_LEVEL) {
+    return response(400, null, "Level ID is required", res);
+  }
+
+  const ID = req.user.ID;
+
+  try {
+    const existingStdLearning = await models.StdLearning.findOne({
+      where: {
+        ID: ID,
+        ID_LEVEL: ID_LEVEL,
+      },
+    });
+
+    if (existingStdLearning && existingStdLearning.SCORE === null) {
+      req.stdLearning = existingStdLearning;
+      return next();
+    }
+
+    return next();
+  } catch (error) {
+    console.log(error);
+    return response(500, null, "Internal Server Error", res);
+  }
+};
diff --git a/models/usersModels/studentModel.js b/models/usersModels/studentModel.js
index e5fd107..56b5266 100644
--- a/models/usersModels/studentModel.js
+++ b/models/usersModels/studentModel.js
@@ -15,10 +15,7 @@ const StudentModel = (DataTypes) => {
       },
       ID_CLASS: {
         type: DataTypes.UUID,
-        allowNull: false,
-        validate: {
-          notEmpty: true,
-        },
+        allowNull: true,
         references: {
           model: "class",
           key: "ID_CLASS",
diff --git a/routes/learning/stdLearning.js b/routes/learning/stdLearning.js
index f6df1bd..a907a18 100644
--- a/routes/learning/stdLearning.js
+++ b/routes/learning/stdLearning.js
@@ -1,5 +1,6 @@
 import express from "express";
 import { getStdLearnings, getStdLearningById, createStdLearning, learningScoreByStdLearningId, learningHistory, learningHistoryBySectionId, learningHistoryByTopicId, getLastCreatedStdLearningByLevelId } from "../../controllers/learningControllers/stdLearning.js";
+import { checkStdLearning } from "../../middlewares/checkStdLearning.js";
 import { verifyLoginUser } from "../../middlewares/User/authUser.js";
 
 const router = express.Router();
@@ -18,6 +19,6 @@ router.get("/learningHistory/topic/:topicId", verifyLoginUser, learningHistoryBy
 
 router.get("/stdLearning/level/:levelId", verifyLoginUser, getLastCreatedStdLearningByLevelId);
 
-router.post("/stdLearning", verifyLoginUser, createStdLearning);
+router.post("/stdLearning", verifyLoginUser, checkStdLearning, createStdLearning);
 
 export default router
\ No newline at end of file