diff --git a/src/main/java/usecase/GetAverageGradeUseCase.java b/src/main/java/usecase/GetAverageGradeUseCase.java
index 25140b18..7b5a3597 100644
--- a/src/main/java/usecase/GetAverageGradeUseCase.java
+++ b/src/main/java/usecase/GetAverageGradeUseCase.java
@@ -28,7 +28,11 @@ public float getAverageGrade(String course) {
         // Call the API to get all the grades for the course for all your team members
         // TODO Task 3a: Complete the logic of calculating the average course grade for
         //              your team members. Hint: the getGrades method might be useful.
-
+        for (String user: team.getMembers()){
+            Grade grade = gradeDataBase.getGrade(user, course);
+            sum += grade.getGrade();
+            count ++;
+        }
         if (count == 0) {
             return 0;
         }