diff --git a/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/controller/ExamController.java b/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/controller/ExamController.java
index ed19647..c40b6e4 100644
--- a/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/controller/ExamController.java
+++ b/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/controller/ExamController.java
@@ -2,15 +2,13 @@
 
 import com.group1.drawingcouseselling.model.dto.ExamDetailInfoDto;
 import com.group1.drawingcouseselling.model.dto.ExamDto;
+import com.group1.drawingcouseselling.model.dto.ExamMarkDto;
 import com.group1.drawingcouseselling.service.ExamService;
 import com.group1.drawingcouseselling.service.JwtService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.data.domain.Page;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestHeader;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 import java.math.BigDecimal;
 
@@ -39,4 +37,12 @@ public ResponseEntity<Page<ExamDto>> getExamsSubmittedListOnPaging(@RequestHeade
     public ResponseEntity<ExamDetailInfoDto> getExamDetailInformation(BigDecimal examID){
         return ResponseEntity.ok(examService.getExamInfoDetail(examID));
     }
+
+    @PostMapping("/exam/mark")
+    public ResponseEntity<ExamDto> markExam(@RequestHeader("Authorization") String authorization,
+                                            @RequestBody ExamMarkDto examMark
+    ){
+        String instructorEmail = jwtService.extractUserEmail(authorization.substring(7));
+        return ResponseEntity.ok(examService.assignScoreSubmit(instructorEmail,examMark));
+    }
 }
diff --git a/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/model/entity/Exam.java b/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/model/entity/Exam.java
index a0e1189..a60b354 100644
--- a/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/model/entity/Exam.java
+++ b/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/model/entity/Exam.java
@@ -28,10 +28,16 @@ public class Exam {
     @PreUpdate
     private void updateScoreStatus(){
         if(score != null){
-            courseContentCompletion.setDone(switch (score) {
-                case 'A', 'B', 'C' -> true;
-                default -> false;
-            });
+            switch (score) {
+                case 'A', 'B', 'C':
+                    courseContentCompletion.setDone(true);
+                    submitStatus = EExamStatus.PASSED;
+                    break;
+                default:
+                    submitStatus = EExamStatus.FAILED;
+                    courseContentCompletion.setDone(false);
+                    break;
+            }
 
         }else {
             courseContentCompletion.setDone(false);
diff --git a/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/service/impl/ExamServiceImpl.java b/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/service/impl/ExamServiceImpl.java
index ba833dd..f1e3b51 100644
--- a/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/service/impl/ExamServiceImpl.java
+++ b/api/drawingcouseselling/src/main/java/com/group1/drawingcouseselling/service/impl/ExamServiceImpl.java
@@ -8,12 +8,13 @@
 import com.group1.drawingcouseselling.model.dto.ExamMarkDto;
 import com.group1.drawingcouseselling.model.entity.Course;
 import com.group1.drawingcouseselling.model.entity.CourseContent;
+import com.group1.drawingcouseselling.model.entity.CourseContentCompletion;
 import com.group1.drawingcouseselling.model.entity.Customer;
 import com.group1.drawingcouseselling.model.enums.EExamStatus;
+import com.group1.drawingcouseselling.repository.CourseContentCompletionRepository;
+import com.group1.drawingcouseselling.repository.CourseContentRepository;
 import com.group1.drawingcouseselling.repository.ExamRepository;
-import com.group1.drawingcouseselling.service.CustomerService;
-import com.group1.drawingcouseselling.service.ExamService;
-import com.group1.drawingcouseselling.service.InstructorService;
+import com.group1.drawingcouseselling.service.*;
 import lombok.RequiredArgsConstructor;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
@@ -30,6 +31,7 @@ public class ExamServiceImpl implements ExamService {
     private final ExamRepository examRepository;
     private final CustomerService customerService;
     private final InstructorService instructorService;
+    private final CourseContentCompletionRepository courseContentCompletionRepository;
     @Override
     public ExamDto getExamInformation(BigDecimal courseContentID, String customerEmail){
         var customer = customerService.searchCustomerByEmail(customerEmail).orElseThrow(() -> new UserNotFoundException(""));
@@ -86,6 +88,24 @@ public ExamDetailInfoDto getExamInfoDetail(BigDecimal examID){
     public ExamDto assignScoreSubmit(String instructorEmail, ExamMarkDto examMark){
         var instructor = instructorService.findInstructorByInstructorEmail(instructorEmail);
         if(instructor == null) throw new UserNotFoundException("");
-        return null;
+        var exam = examRepository.findById(examMark.examID()).orElseThrow(() ->
+                new EntityNotFoundException("This exam isn't existed"));
+        exam.setScore(examMark.score());
+        exam.setInstructorComment(examMark.comment());
+        var result = examRepository.save(exam);
+        var a = result.getCourseContentCompletion();
+        if(result.getSubmitStatus() == EExamStatus.PASSED){
+            a.setDone(true);
+        }else{
+            a.setDone(false);
+        }
+        courseContentCompletionRepository.save(a);
+        return ExamDto.builder()
+                .id(result.getId())
+                .examStatus(result.getSubmitStatus())
+                .comment(result.getInstructorComment())
+                .score(result.getScore())
+                .artLink(result.getArtLinked())
+                .build();
     }
 }