fix

mec-teacher/src/main/java/com/ym/mec/teacher/controller/ClassGroupController.java

@@ -89,7 +89,7 @@ public class ClassGroupController extends BaseController {
                 }
             });
         }
-        return succeed();
+        return succeed(courseStudents);
     }
 
     @ApiOperation(value = "提交陪练报告")