diff --git a/src/main/java/app/Config.java b/src/main/java/app/Config.java
index 12df0fd5..3b2938ea 100644
--- a/src/main/java/app/Config.java
+++ b/src/main/java/app/Config.java
@@ -65,5 +65,6 @@ public GetAverageGradeUseCase getAverageGradeUseCase() {
         return new GetAverageGradeUseCase(gradeDataBase);
     }
 
+    public GetTopGradeUseCase getTopGradeUseCase() {return new GetTopGradeUseCase(gradeDataBase);}
     // TODO Task 4: add code for the new GetTopGradeUseCase following the same pattern as the other use cases above.
 }
diff --git a/src/main/java/app/gui/Application.java b/src/main/java/app/gui/Application.java
index ff61dddc..d177ebc1 100644
--- a/src/main/java/app/gui/Application.java
+++ b/src/main/java/app/gui/Application.java
@@ -21,12 +21,7 @@
 import api.MongoGradeDataBase;
 import app.Config;
 import entity.Grade;
-import usecase.FormTeamUseCase;
-import usecase.GetAverageGradeUseCase;
-import usecase.GetGradeUseCase;
-import usecase.JoinTeamUseCase;
-import usecase.LeaveTeamUseCase;
-import usecase.LogGradeUseCase;
+import usecase.*;
 
 /**
  * GUI class to run the GUI for the Grade App.
@@ -55,6 +50,7 @@ public static void main(String[] args) {
         final JoinTeamUseCase joinTeamUseCase = config.joinTeamUseCase();
         final LeaveTeamUseCase leaveTeamUseCase = config.leaveTeamUseCase();
         final GetAverageGradeUseCase getAverageGradeUseCase = config.getAverageGradeUseCase();
+        final GetTopGradeUseCase getTopGradeUseCase = config.getTopGradeUseCase();
 
         // this is the code that runs to set up our GUI
         SwingUtilities.invokeLater(() -> {
@@ -70,7 +66,7 @@ public static void main(String[] args) {
             final JPanel logGradeCard = createLogGradeCard(frame, logGradeUseCase);
             final JPanel formTeamCard = createFormTeamCard(frame, formTeamUseCase);
             final JPanel joinTeamCard = createJoinTeamCard(frame, joinTeamUseCase);
-            final JPanel manageTeamCard = createManageTeamCard(frame, leaveTeamUseCase, getAverageGradeUseCase);
+            final JPanel manageTeamCard = createManageTeamCard(frame, leaveTeamUseCase, getAverageGradeUseCase, getTopGradeUseCase);
 
             cardPanel.add(defaultCard, "DefaultCard");
             cardPanel.add(getGradeCard, "GetGradeCard");
@@ -324,13 +320,15 @@ public void actionPerformed(ActionEvent e) {
     // TODO Task 4: modify this method so that it takes in a getTopGradeUseCase
     //              Note: this will require you to update the code that calls this method.
     private static JPanel createManageTeamCard(JFrame jFrame, LeaveTeamUseCase leaveTeamUseCase,
-                                               GetAverageGradeUseCase getAverageGradeUseCase) {
+                                               GetAverageGradeUseCase getAverageGradeUseCase,
+                                               GetTopGradeUseCase getTopGradeUseCase) {
         final JPanel theCard = new JPanel();
         theCard.setLayout(new GridLayout(ROWS, COLS));
         final JTextField courseField = new JTextField(20);
         // make a separate line.
         final JButton getAverageButton = new JButton("Get Average Grade");
         // TODO Task 4: Add another button for "Get Top Grade" (check the getAverageButton for example)
+        final JButton getTopButton = new JButton("Get Top Grade");
 
         final JButton leaveTeamButton = new JButton("Leave Team");
         final JLabel resultLabel = new JLabel();
@@ -357,6 +355,26 @@ public void actionPerformed(ActionEvent e) {
         });
 
         // TODO Task 4: Add action listener for getTopGrade button, follow example of getAverageButton
+        getTopButton.addActionListener(new ActionListener() {
+            /**
+             * Invoked when an action occurs.
+             *
+             * @param e the event to be processed
+             */
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                final String course = courseField.getText();
+
+                try {
+                    final float top = getTopGradeUseCase.getTopGrade(course);
+                    JOptionPane.showMessageDialog(jFrame, "Top Grade: " + top);
+                    courseField.setText("");
+                }
+                catch (JSONException ex) {
+                    JOptionPane.showMessageDialog(jFrame, ex.getMessage());
+                }
+            }
+        });
 
         leaveTeamButton.addActionListener(new ActionListener() {
             /**
@@ -379,6 +397,7 @@ public void actionPerformed(ActionEvent e) {
         theCard.add(new JLabel("The course you want to calculate the team average for:"));
         theCard.add(courseField);
         theCard.add(getAverageButton);
+        theCard.add(getTopButton);
         theCard.add(leaveTeamButton);
         theCard.add(resultLabel);
         return theCard;