diff --git a/src/main/java/seedu/address/logic/parser/AddGroupCommandParser.java b/src/main/java/seedu/address/logic/parser/AddGroupCommandParser.java
index 2d49155b435..5e04d0f53b2 100644
--- a/src/main/java/seedu/address/logic/parser/AddGroupCommandParser.java
+++ b/src/main/java/seedu/address/logic/parser/AddGroupCommandParser.java
@@ -10,7 +10,7 @@
 import seedu.address.logic.commands.AddGroupCommand;
 import seedu.address.logic.parser.exceptions.ParseException;
 import seedu.address.model.student.ClassCode;
-import seedu.address.model.tutorialgroup.GroupName;
+import seedu.address.model.tutorialgroup.GroupNumber;
 import seedu.address.model.tutorialgroup.GroupType;
 import seedu.address.model.tutorialgroup.TutorialGroup;
 
@@ -30,11 +30,11 @@ public AddGroupCommand parse(String args) throws ParseException {
             throw new ParseException(String.format(MESSAGE_INVALID_COMMAND_FORMAT, AddGroupCommand.MESSAGE_USAGE));
         }
 
-        GroupName groupName = ParserUtil.parseGroupName(argMultimap.getValue(PREFIX_GROUPNAME).get());
+        GroupNumber groupNumber = ParserUtil.parseGroupName(argMultimap.getValue(PREFIX_GROUPNAME).get());
         ClassCode classCode = ParserUtil.parseClassCode(argMultimap.getValue(PREFIX_CLASSCODE).get());
         GroupType groupType = ParserUtil.parseGroupType(argMultimap.getValue(PREFIX_TYPE).get());
 
-        TutorialGroup tutorialGroup = new TutorialGroup(groupName, classCode, groupType);
+        TutorialGroup tutorialGroup = new TutorialGroup(groupNumber, classCode, groupType);
 
         return new AddGroupCommand(tutorialGroup);
 
diff --git a/src/main/java/seedu/address/logic/parser/ParserUtil.java b/src/main/java/seedu/address/logic/parser/ParserUtil.java
index a7c7b2f694e..9d790cd47c2 100644
--- a/src/main/java/seedu/address/logic/parser/ParserUtil.java
+++ b/src/main/java/seedu/address/logic/parser/ParserUtil.java
@@ -17,7 +17,7 @@
 import seedu.address.model.student.StudentMark;
 import seedu.address.model.tag.Tag;
 import seedu.address.model.tutorialclass.Schedule;
-import seedu.address.model.tutorialgroup.GroupName;
+import seedu.address.model.tutorialgroup.GroupNumber;
 import seedu.address.model.tutorialgroup.GroupType;
 
 /**
@@ -151,13 +151,13 @@ public static Schedule parseSchedule(String schedule) throws ParseException {
      * Leading and trailing whitespaces will be trimmed.
      * @throws ParseException if the given {@code schedule} is invalid.
      */
-    public static GroupName parseGroupName(String groupName) throws ParseException {
+    public static GroupNumber parseGroupName(String groupName) throws ParseException {
         requireNonNull(groupName);
         String trimmedGroupName = groupName.trim();
-        if (!GroupName.isValidGroupName(groupName)) {
-            throw new ParseException(GroupName.MESSAGE_CONSTRAINTS);
+        if (!GroupNumber.isValidGroupName(groupName)) {
+            throw new ParseException(GroupNumber.MESSAGE_CONSTRAINTS);
         }
-        return new GroupName(trimmedGroupName);
+        return new GroupNumber(trimmedGroupName);
     }
 
     /**
diff --git a/src/main/java/seedu/address/model/tutorialgroup/GroupName.java b/src/main/java/seedu/address/model/tutorialgroup/GroupNumber.java
similarity index 80%
rename from src/main/java/seedu/address/model/tutorialgroup/GroupName.java
rename to src/main/java/seedu/address/model/tutorialgroup/GroupNumber.java
index 945bc16655e..4aef57234f5 100644
--- a/src/main/java/seedu/address/model/tutorialgroup/GroupName.java
+++ b/src/main/java/seedu/address/model/tutorialgroup/GroupNumber.java
@@ -4,7 +4,7 @@
 import static java.util.Objects.requireNonNull;
 import static seedu.address.commons.util.AppUtil.checkArgument;
 
-public class GroupName implements Comparable<GroupName> {
+public class GroupNumber implements Comparable<GroupNumber> {
     public static final String MESSAGE_CONSTRAINTS = "GroupName must be a single digit, and it should not be blank";
 
     private static final String GROUPNAME_REGEX = "\\d";
@@ -16,7 +16,7 @@ public class GroupName implements Comparable<GroupName> {
      *
      * @param groupName A valid groupName.
      */
-    public GroupName (String groupName) {
+    public GroupNumber(String groupName) {
         requireNonNull(groupName);
         checkArgument(isValidGroupName(groupName), MESSAGE_CONSTRAINTS);
         value = groupName;
@@ -44,8 +44,8 @@ public String toString() {
     @Override
     public boolean equals(Object other) {
         return other == this // short circuit if same object
-                || (other instanceof GroupName // instanceof handles nulls
-                && value.equals(((GroupName) other).value)); // state check
+                || (other instanceof GroupNumber // instanceof handles nulls
+                && value.equals(((GroupNumber) other).value)); // state check
     }
 
     @Override
@@ -54,8 +54,8 @@ public int hashCode() {
     }
 
     @Override
-    public int compareTo(GroupName groupName) {
-        return parseGroupName(this.value).compareTo(parseGroupName(groupName.value));
+    public int compareTo(GroupNumber groupNumber) {
+        return parseGroupName(this.value).compareTo(parseGroupName(groupNumber.value));
     }
 
 }
diff --git a/src/main/java/seedu/address/model/tutorialgroup/TutorialGroup.java b/src/main/java/seedu/address/model/tutorialgroup/TutorialGroup.java
index 4442630fbd1..2dc94054e3d 100644
--- a/src/main/java/seedu/address/model/tutorialgroup/TutorialGroup.java
+++ b/src/main/java/seedu/address/model/tutorialgroup/TutorialGroup.java
@@ -6,23 +6,23 @@
 
 public class TutorialGroup {
 
-    private final GroupName groupName;
+    private final GroupNumber groupNumber;
     private final ClassCode classCode;
     private final GroupType groupType;
 
     /**
-     * @param groupName GroupName of Tutorial Group.
+     * @param groupNumber GroupName of Tutorial Group.
      * @param classCode ClassCode of Tutorial Group.
      */
-    public TutorialGroup(GroupName groupName, ClassCode classCode, GroupType groupType) {
-        this.groupName = groupName;
+    public TutorialGroup(GroupNumber groupNumber, ClassCode classCode, GroupType groupType) {
+        this.groupNumber = groupNumber;
         this.classCode = classCode;
         this.groupType = groupType;
 
     }
 
-    public GroupName getGroupName() {
-        return groupName;
+    public GroupNumber getGroupName() {
+        return groupNumber;
     }
 
     public ClassCode getClassCode() {
@@ -67,7 +67,7 @@ public boolean equals(Object other) {
 
     @Override
     public int hashCode() {
-        return Objects.hash(groupName, classCode, groupType);
+        return Objects.hash(groupNumber, classCode, groupType);
     }
 
     @Override
diff --git a/src/main/java/seedu/address/storage/JsonAdaptedTutorialGroup.java b/src/main/java/seedu/address/storage/JsonAdaptedTutorialGroup.java
index 2f74279f0ab..b7b7c2e84a8 100644
--- a/src/main/java/seedu/address/storage/JsonAdaptedTutorialGroup.java
+++ b/src/main/java/seedu/address/storage/JsonAdaptedTutorialGroup.java
@@ -6,7 +6,7 @@
 import seedu.address.commons.exceptions.IllegalValueException;
 import seedu.address.model.student.ClassCode;
 import seedu.address.model.tag.Tag;
-import seedu.address.model.tutorialgroup.GroupName;
+import seedu.address.model.tutorialgroup.GroupNumber;
 import seedu.address.model.tutorialgroup.GroupType;
 import seedu.address.model.tutorialgroup.TutorialGroup;
 
@@ -56,11 +56,11 @@ public TutorialGroup toModelType() throws IllegalValueException {
 
         if (groupName == null) {
             throw new IllegalValueException(
-                    String.format(MISSING_FIELD_MESSAGE_FORMAT, GroupName.class.getSimpleName())
+                    String.format(MISSING_FIELD_MESSAGE_FORMAT, GroupNumber.class.getSimpleName())
             );
         }
 
-        final GroupName modelGroupName = new GroupName(groupName);
+        final GroupNumber modelGroupNumber = new GroupNumber(groupName);
 
         if (groupType == null) {
             throw new IllegalValueException(String.format(MISSING_FIELD_MESSAGE_FORMAT, String.class.getSimpleName()));
@@ -68,7 +68,7 @@ public TutorialGroup toModelType() throws IllegalValueException {
 
         final GroupType modelGroupType = new GroupType(groupType);
 
-        return new TutorialGroup(modelGroupName, modelClassCode, modelGroupType);
+        return new TutorialGroup(modelGroupNumber, modelClassCode, modelGroupType);
     }
 
 }
diff --git a/src/test/java/seedu/address/logic/commands/AddGroupCommandTest.java b/src/test/java/seedu/address/logic/commands/AddGroupCommandTest.java
index a91b8992145..0411b02f9de 100644
--- a/src/test/java/seedu/address/logic/commands/AddGroupCommandTest.java
+++ b/src/test/java/seedu/address/logic/commands/AddGroupCommandTest.java
@@ -52,8 +52,8 @@ public void execute_duplicateTutorialGroup_throwsCommandException() {
 
     @Test
     public void equals() {
-        TutorialGroup a = new TutorialGroupBuilder().withClassCode("a").build();
-        TutorialGroup b = new TutorialGroupBuilder().withClassCode("b").build();
+        TutorialGroup a = new TutorialGroupBuilder().withClassCode("G01").build();
+        TutorialGroup b = new TutorialGroupBuilder().withClassCode("G02").build();
 
         AddGroupCommand addACommand = new AddGroupCommand(a);
         AddGroupCommand addBCommand = new AddGroupCommand(b);
diff --git a/src/test/java/seedu/address/logic/parser/AddGroupCommandParserTest.java b/src/test/java/seedu/address/logic/parser/AddGroupCommandParserTest.java
index b732520167d..a15c6fc7844 100644
--- a/src/test/java/seedu/address/logic/parser/AddGroupCommandParserTest.java
+++ b/src/test/java/seedu/address/logic/parser/AddGroupCommandParserTest.java
@@ -21,7 +21,7 @@
 import org.junit.jupiter.api.Test;
 
 import seedu.address.logic.commands.AddGroupCommand;
-import seedu.address.model.tutorialgroup.GroupName;
+import seedu.address.model.tutorialgroup.GroupNumber;
 import seedu.address.model.tutorialgroup.GroupType;
 import seedu.address.model.tutorialgroup.TutorialGroup;
 import seedu.address.testutil.TutorialGroupBuilder;
@@ -78,7 +78,7 @@ public void parse_invalidValue_failure() {
 
         // invalid group name
         assertParseFailure(parser, INVALID_GROUPNAME_DESC + CLASSCODE_DESC_G01 + GROUPTYPE_DESC_OP1,
-                GroupName.MESSAGE_CONSTRAINTS);
+                GroupNumber.MESSAGE_CONSTRAINTS);
 
         // invalid group type
         assertParseFailure(parser, GROUPNAME_DESC_1 + CLASSCODE_DESC_G01 + INVALID_GROUPTYPE_DESC,
@@ -86,7 +86,7 @@ public void parse_invalidValue_failure() {
 
         // two invalid values, only first invalid value reported
         assertParseFailure(parser, INVALID_GROUPNAME_DESC + CLASSCODE_DESC_G01 + INVALID_GROUPTYPE_DESC,
-                GroupName.MESSAGE_CONSTRAINTS);
+                GroupNumber.MESSAGE_CONSTRAINTS);
 
         // preamble not empty
         assertParseFailure(parser, PREAMBLE_NON_EMPTY + CLASSCODE_DESC_G01 + GROUPNAME_DESC_1 + GROUPTYPE_DESC_OP1,
diff --git a/src/test/java/seedu/address/model/tutorialgroup/GroupNameTest.java b/src/test/java/seedu/address/model/tutorialgroup/GroupNameTest.java
deleted file mode 100644
index 47f6aa6f7d8..00000000000
--- a/src/test/java/seedu/address/model/tutorialgroup/GroupNameTest.java
+++ /dev/null
@@ -1,40 +0,0 @@
-package seedu.address.model.tutorialgroup;
-
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-import static seedu.address.testutil.Assert.assertThrows;
-
-import org.junit.jupiter.api.Test;
-
-
-public class GroupNameTest {
-
-    @Test
-    public void constructor_null_throwsNullPointerException() {
-        assertThrows(NullPointerException.class, () -> new GroupName(null));
-    }
-
-    @Test
-    public void constructor_invalidName_throwsIllegalArgumentException() {
-        String invalidGroupName = "";
-        assertThrows(IllegalArgumentException.class, () -> new GroupName(invalidGroupName));
-    }
-
-    @Test
-    public void isValidName() {
-        // null group name
-        assertThrows(NullPointerException.class, () -> GroupName.isValidGroupName(null));
-
-        // invalid group name
-        assertFalse(GroupName.isValidGroupName("")); // empty string
-        assertFalse(GroupName.isValidGroupName(" ")); // spaces only
-        assertFalse(GroupName.isValidGroupName("^")); // only non-alphanumeric characters
-        assertFalse(GroupName.isValidGroupName("peter*")); // contains non-alphanumeric characters
-        assertFalse(GroupName.isValidGroupName("peter")); // contains alphabets
-        assertFalse(GroupName.isValidGroupName("12")); // contains more than one digit
-
-        // valid group name
-        assertTrue(GroupName.isValidGroupName("1")); // alphabets only
-        assertTrue(GroupName.isValidGroupName("2")); // numbers only
-    }
-}
diff --git a/src/test/java/seedu/address/model/tutorialgroup/GroupNumberTest.java b/src/test/java/seedu/address/model/tutorialgroup/GroupNumberTest.java
new file mode 100644
index 00000000000..cf2f423d794
--- /dev/null
+++ b/src/test/java/seedu/address/model/tutorialgroup/GroupNumberTest.java
@@ -0,0 +1,40 @@
+package seedu.address.model.tutorialgroup;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static seedu.address.testutil.Assert.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+
+public class GroupNumberTest {
+
+    @Test
+    public void constructor_null_throwsNullPointerException() {
+        assertThrows(NullPointerException.class, () -> new GroupNumber(null));
+    }
+
+    @Test
+    public void constructor_invalidName_throwsIllegalArgumentException() {
+        String invalidGroupName = "";
+        assertThrows(IllegalArgumentException.class, () -> new GroupNumber(invalidGroupName));
+    }
+
+    @Test
+    public void isValidName() {
+        // null group name
+        assertThrows(NullPointerException.class, () -> GroupNumber.isValidGroupName(null));
+
+        // invalid group name
+        assertFalse(GroupNumber.isValidGroupName("")); // empty string
+        assertFalse(GroupNumber.isValidGroupName(" ")); // spaces only
+        assertFalse(GroupNumber.isValidGroupName("^")); // only non-alphanumeric characters
+        assertFalse(GroupNumber.isValidGroupName("peter*")); // contains non-alphanumeric characters
+        assertFalse(GroupNumber.isValidGroupName("peter")); // contains alphabets
+        assertFalse(GroupNumber.isValidGroupName("12")); // contains more than one digit
+
+        // valid group name
+        assertTrue(GroupNumber.isValidGroupName("1")); // alphabets only
+        assertTrue(GroupNumber.isValidGroupName("2")); // numbers only
+    }
+}
diff --git a/src/test/java/seedu/address/model/tutorialgroup/TutorialGroupTest.java b/src/test/java/seedu/address/model/tutorialgroup/TutorialGroupTest.java
index 68964d51a4d..9df564142dd 100644
--- a/src/test/java/seedu/address/model/tutorialgroup/TutorialGroupTest.java
+++ b/src/test/java/seedu/address/model/tutorialgroup/TutorialGroupTest.java
@@ -2,10 +2,10 @@
 
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
-import static seedu.address.logic.commands.CommandTestUtil.VALID_CLASSCODE_G102;
+import static seedu.address.logic.commands.CommandTestUtil.VALID_CLASSCODE_G01;
+import static seedu.address.logic.commands.CommandTestUtil.VALID_CLASSCODE_G02;
 import static seedu.address.logic.commands.CommandTestUtil.VALID_GROUPNAME_2;
 import static seedu.address.logic.commands.CommandTestUtil.VALID_GROUPTYPE_OP2;
-import static seedu.address.logic.commands.CommandTestUtil.VALID_NAME_BOB;
 import static seedu.address.testutil.TypicalTutorialGroups.TUT_01;
 import static seedu.address.testutil.TypicalTutorialGroups.TUT_02;
 
@@ -29,17 +29,17 @@ public void isSameTutorialGroup() {
         assertFalse(TUT_01.isSameTutorialGroup(editedTut01));
 
         // same group name, all other attributes different -> returns false
-        editedTut01 = new TutorialGroupBuilder(TUT_01).withClassCode(VALID_CLASSCODE_G102)
+        editedTut01 = new TutorialGroupBuilder(TUT_01).withClassCode(VALID_CLASSCODE_G01)
                 .withGroupType(VALID_GROUPTYPE_OP2).build();
         assertFalse(TUT_01.isSameTutorialGroup(editedTut01));
 
         // same group type, all other attributes different -> returns false
-        editedTut01 = new TutorialGroupBuilder(TUT_01).withClassCode(VALID_CLASSCODE_G102)
+        editedTut01 = new TutorialGroupBuilder(TUT_01).withClassCode(VALID_CLASSCODE_G02)
                 .withGroupName(VALID_GROUPNAME_2).build();
         assertFalse(TUT_01.isSameTutorialGroup(editedTut01));
 
         // different class code, all other attributes same -> returns false
-        editedTut01 = new TutorialGroupBuilder(TUT_01).withClassCode(VALID_NAME_BOB).build();
+        editedTut01 = new TutorialGroupBuilder(TUT_01).withClassCode(VALID_CLASSCODE_G02).build();
         assertFalse(TUT_01.isSameTutorialGroup(editedTut01));
 
         // different group name, all other attributes same -> returns false
@@ -70,7 +70,7 @@ public void equals() {
         assertFalse(TUT_01.equals(TUT_02));
 
         // different class code -> returns false
-        TutorialGroup editedTut01 = new TutorialGroupBuilder(TUT_01).withClassCode(VALID_CLASSCODE_G102).build();
+        TutorialGroup editedTut01 = new TutorialGroupBuilder(TUT_01).withClassCode(VALID_CLASSCODE_G02).build();
         assertFalse(TUT_01.equals(editedTut01));
 
         // different group name -> returns false
diff --git a/src/test/java/seedu/address/testutil/TutorialGroupBuilder.java b/src/test/java/seedu/address/testutil/TutorialGroupBuilder.java
index 9060cbb5522..525cbf56720 100644
--- a/src/test/java/seedu/address/testutil/TutorialGroupBuilder.java
+++ b/src/test/java/seedu/address/testutil/TutorialGroupBuilder.java
@@ -1,18 +1,18 @@
 package seedu.address.testutil;
 
 import seedu.address.model.student.ClassCode;
-import seedu.address.model.tutorialgroup.GroupName;
+import seedu.address.model.tutorialgroup.GroupNumber;
 import seedu.address.model.tutorialgroup.GroupType;
 import seedu.address.model.tutorialgroup.TutorialGroup;
 
 public class TutorialGroupBuilder {
 
-    public static final String DEFAULT_CLASSCODE = "G01";
+    public static final String DEFAULT_CLASSCODE = "G06";
     public static final String DEFAULT_GROUPNAME = "1";
     public static final String DEFAULT_GROUPTYPE = "OP1";
 
     private ClassCode classCode;
-    private GroupName groupName;
+    private GroupNumber groupNumber;
     private GroupType groupType;
 
     /**
@@ -20,7 +20,7 @@ public class TutorialGroupBuilder {
      */
     public TutorialGroupBuilder() {
         classCode = new ClassCode(DEFAULT_CLASSCODE);
-        groupName = new GroupName(DEFAULT_GROUPNAME);
+        groupNumber = new GroupNumber(DEFAULT_GROUPNAME);
         groupType = new GroupType(DEFAULT_GROUPTYPE);
     }
 
@@ -29,7 +29,7 @@ public TutorialGroupBuilder() {
      */
     public TutorialGroupBuilder(TutorialGroup tutorialGroupToCopy) {
         classCode = tutorialGroupToCopy.getClassCode();
-        groupName = tutorialGroupToCopy.getGroupName();
+        groupNumber = tutorialGroupToCopy.getGroupName();
         groupType = tutorialGroupToCopy.getGroupType();
     }
 
@@ -45,7 +45,7 @@ public TutorialGroupBuilder withClassCode(String classCode) {
      * Sets the {@code ClassCode} of the {@code TutorialClass} that we are building.
      */
     public TutorialGroupBuilder withGroupName(String groupName) {
-        this.groupName = new GroupName(groupName);
+        this.groupNumber = new GroupNumber(groupName);
         return this;
     }
 
@@ -58,6 +58,6 @@ public TutorialGroupBuilder withGroupType(String groupType) {
     }
 
     public TutorialGroup build() {
-        return new TutorialGroup(groupName, classCode, groupType);
+        return new TutorialGroup(groupNumber, classCode, groupType);
     }
 }
diff --git a/src/test/java/seedu/address/testutil/TypicalTutorialGroups.java b/src/test/java/seedu/address/testutil/TypicalTutorialGroups.java
index f5fbf10d1b7..508994d0110 100644
--- a/src/test/java/seedu/address/testutil/TypicalTutorialGroups.java
+++ b/src/test/java/seedu/address/testutil/TypicalTutorialGroups.java
@@ -1,7 +1,7 @@
 package seedu.address.testutil;
 
-import static seedu.address.logic.commands.CommandTestUtil.VALID_CLASSCODE_G101;
-import static seedu.address.logic.commands.CommandTestUtil.VALID_CLASSCODE_G102;
+import static seedu.address.logic.commands.CommandTestUtil.VALID_CLASSCODE_G01;
+import static seedu.address.logic.commands.CommandTestUtil.VALID_CLASSCODE_G02;
 import static seedu.address.logic.commands.CommandTestUtil.VALID_GROUPNAME_1;
 import static seedu.address.logic.commands.CommandTestUtil.VALID_GROUPNAME_2;
 import static seedu.address.logic.commands.CommandTestUtil.VALID_GROUPTYPE_OP1;
@@ -18,9 +18,9 @@
  * A utility class containing a list of {@code TutorialGroup} objects to be used in tests.
  */
 public class TypicalTutorialGroups {
-    public static final TutorialGroup TUT_01 = new TutorialGroupBuilder().withClassCode(VALID_CLASSCODE_G101)
+    public static final TutorialGroup TUT_01 = new TutorialGroupBuilder().withClassCode(VALID_CLASSCODE_G01)
             .withGroupName(VALID_GROUPNAME_1).withGroupType(VALID_GROUPTYPE_OP1).build();
-    public static final TutorialGroup TUT_02 = new TutorialGroupBuilder().withClassCode(VALID_CLASSCODE_G102)
+    public static final TutorialGroup TUT_02 = new TutorialGroupBuilder().withClassCode(VALID_CLASSCODE_G02)
             .withGroupName(VALID_GROUPNAME_2).withGroupType(VALID_GROUPTYPE_OP2).build();
 
     // Prevent instantiation