diff --git a/src/main/java/seedu/address/logic/Logic.java b/src/main/java/seedu/address/logic/Logic.java
index 844bcd8146d..448b9b304f1 100644
--- a/src/main/java/seedu/address/logic/Logic.java
+++ b/src/main/java/seedu/address/logic/Logic.java
@@ -12,6 +12,7 @@
 import seedu.address.model.group.Group;
 import seedu.address.model.group.Lesson;
 import seedu.address.model.group.Student;
+import seedu.address.model.group.StudentInfo;
 import seedu.address.model.person.Person;
 
 /**
@@ -69,15 +70,20 @@ public interface Logic {
     ObservableList<Group> getFilteredGroupList();
 
     /**
-     * Returns an unmodifiable view of the filtered list of Students from a group.
+     * Returns an unmodifiable view of the filtered list of students from a group.
      */
     ObservableList<Student> getStudentList();
 
     /**
-     * Returns an unmodifiable view of the list of lesson from a group.
+     * Returns an unmodifiable view of the filtered list of lesson from a group.
      */
     ObservableList<Lesson> getLessonList();
 
+    /**
+     * Returns an unmodifiable view of the filtered list of students info from a group-lesson.
+     */
+    ObservableList<StudentInfo> getFilteredStudentInfoList();
+
     /**
      * Returns the user prefs' serenity file path.
      */
diff --git a/src/main/java/seedu/address/logic/LogicManager.java b/src/main/java/seedu/address/logic/LogicManager.java
index 652b43799a4..57cae40b364 100644
--- a/src/main/java/seedu/address/logic/LogicManager.java
+++ b/src/main/java/seedu/address/logic/LogicManager.java
@@ -18,6 +18,7 @@
 import seedu.address.model.group.Group;
 import seedu.address.model.group.Lesson;
 import seedu.address.model.group.Student;
+import seedu.address.model.group.StudentInfo;
 import seedu.address.model.person.Person;
 import seedu.address.storage.Storage;
 
@@ -85,6 +86,8 @@ public void setGuiSettings(GuiSettings guiSettings) {
         model.setGuiSettings(guiSettings);
     }
 
+    // ========== Serenity ==========
+
     @Override
     public ReadOnlySerenity getSerenity() {
         return model.getSerenity();
@@ -105,6 +108,11 @@ public ObservableList<Lesson> getLessonList() {
         return model.getLessonList();
     }
 
+    @Override
+    public ObservableList<StudentInfo> getFilteredStudentInfoList() {
+        return model.getStudentInfoList();
+    }
+
     @Override
     public Path getSerenityFilePath() {
         return model.getSerenityFilePath();
diff --git a/src/main/java/seedu/address/logic/commands/ViewLsnCommand.java b/src/main/java/seedu/address/logic/commands/ViewLsnCommand.java
index e59a83ba579..160867df3bf 100644
--- a/src/main/java/seedu/address/logic/commands/ViewLsnCommand.java
+++ b/src/main/java/seedu/address/logic/commands/ViewLsnCommand.java
@@ -36,13 +36,13 @@ private String getMessage(Model model) {
                 ? Messages.MESSAGE_LESSON_EMPTY
                 : String.format(Messages.MESSAGE_LESSON_LISTED_OVERVIEW,
                 model.getFilteredGroupList().get(0).getName(),
-                model.getLessonList());
+                model.getFilteredLessonList().get(0).getName());
     }
 
     @Override
     public CommandResult execute(Model model) {
         requireNonNull(model);
-        model.updateFilteredGroupList(grpPredicate);
+        model.updateFilteredLessonList(lsnPredicate);
         return new CommandResult(this.getMessage(model));
     }
 
diff --git a/src/main/java/seedu/address/model/Model.java b/src/main/java/seedu/address/model/Model.java
index cd8d1d9354c..1eb5b026092 100644
--- a/src/main/java/seedu/address/model/Model.java
+++ b/src/main/java/seedu/address/model/Model.java
@@ -8,6 +8,7 @@
 import seedu.address.model.group.Group;
 import seedu.address.model.group.Lesson;
 import seedu.address.model.group.Student;
+import seedu.address.model.group.StudentInfo;
 import seedu.address.model.person.Person;
 
 /**
@@ -95,6 +96,8 @@ public interface Model {
      */
     void updateFilteredPersonList(Predicate<Person> predicate);
 
+    // ========== Serenity ==========
+
     /**
      * Returns the user prefs' serenity file path.
      */
@@ -137,18 +140,46 @@ public interface Model {
      */
     void updateStudentList();
 
-
     /**
      * Updates the lesson list to filter when changing to another group of interest.
      */
-    public void updateLessonList();
+    void updateLessonList();
+
+    /**
+     * Updates the filter of the filtered group list to filter by the given {@code predicate}.
+     *
+     * @throws NullPointerException if {@code predicate} is null.
+     */
+    void updateFilteredLessonList(Predicate<Lesson> predicate);
+
+    /**
+     * Updates the student info list to filter when changing to another lesson of interest.
+     */
+    void updateStudentInfoList();
 
     /**
-     * Returns an unmodifiable view of the filtered group list
+     * Returns an unmodifiable view of the filtered group list.
      */
     ObservableList<Group> getFilteredGroupList();
 
+    /**
+     * Returns an unmodifiable view of the student list.
+     */
     ObservableList<Student> getStudentList();
 
+    /**
+     * Returns an unmodifiable view of the lesson list.
+     */
     ObservableList<Lesson> getLessonList();
+
+    /**
+     * Returns an unmodifiable view of the filtered lesson list.
+     */
+    ObservableList<Lesson> getFilteredLessonList();
+
+    /**
+     * Returns an unmodifiable view of the student info list
+     */
+    ObservableList<StudentInfo> getStudentInfoList();
+
 }
diff --git a/src/main/java/seedu/address/model/ModelManager.java b/src/main/java/seedu/address/model/ModelManager.java
index 35ae1b6c06a..ccffd1cff41 100644
--- a/src/main/java/seedu/address/model/ModelManager.java
+++ b/src/main/java/seedu/address/model/ModelManager.java
@@ -11,11 +11,7 @@
 import javafx.collections.transformation.FilteredList;
 import seedu.address.commons.core.GuiSettings;
 import seedu.address.commons.core.LogsCenter;
-import seedu.address.model.group.Group;
-import seedu.address.model.group.Lesson;
-import seedu.address.model.group.Student;
-import seedu.address.model.group.UniqueLessonList;
-import seedu.address.model.group.UniqueStudentList;
+import seedu.address.model.group.*;
 import seedu.address.model.person.Person;
 
 /**
@@ -26,13 +22,15 @@ public class ModelManager implements Model {
     private static final Logger logger = LogsCenter.getLogger(ModelManager.class);
 
     private final AddressBook addressBook;
-    private final Serenity serenity;
     private final UserPrefs userPrefs;
-
     private final FilteredList<Person> filteredPersons;
+
+    private final Serenity serenity;
     private final FilteredList<Group> filteredGroups;
     private final ArrayObservableList<Student> students;
     private final ArrayObservableList<Lesson> lessons;
+    private final FilteredList<Lesson> filteredLessons;
+    private final ArrayObservableList<StudentInfo> studentsInfo;
 
     /**
      * Initializes a ModelManager with the given addressBook, userPrefs and serenity.
@@ -47,13 +45,15 @@ public ModelManager(ReadOnlyAddressBook addressBook, ReadOnlyUserPrefs userPrefs
                 + " and serenity " + serenity);
 
         this.addressBook = new AddressBook(addressBook);
-        this.serenity = new Serenity(serenity);
         this.userPrefs = new UserPrefs(userPrefs);
 
+        this.serenity = new Serenity(serenity);
         filteredPersons = new FilteredList<>(this.addressBook.getPersonList());
         filteredGroups = new FilteredList<>(this.serenity.getGroupList());
         students = new ArrayObservableList<>(new UniqueStudentList().asUnmodifiableObservableList());
-        lessons = new ArrayObservableList<>(new UniqueLessonList().asUnmodifiableObservableList());
+        lessons =  new ArrayObservableList<>(new UniqueLessonList().asUnmodifiableObservableList());
+        filteredLessons = new FilteredList<>(new UniqueLessonList().asUnmodifiableObservableList());
+        studentsInfo = new ArrayObservableList<>(new UniqueStudentInfoList().asUnmodifiableObservableList());
     }
 
     /**
@@ -66,20 +66,22 @@ public ModelManager(ReadOnlyAddressBook addressBook, ReadOnlyUserPrefs userPrefs
         logger.fine("Initializing with address book: " + addressBook + " and user prefs " + userPrefs);
 
         this.addressBook = new AddressBook(addressBook);
-        this.serenity = new Serenity();
         this.userPrefs = new UserPrefs(userPrefs);
 
+        this.serenity = new Serenity();
         filteredPersons = new FilteredList<>(this.addressBook.getPersonList());
         filteredGroups = new FilteredList<>(this.serenity.getGroupList());
         students = new ArrayObservableList<>(new UniqueStudentList().asUnmodifiableObservableList());
-        lessons = new ArrayObservableList<>(new UniqueLessonList().asUnmodifiableObservableList());
+        lessons =  new ArrayObservableList<>(new UniqueLessonList().asUnmodifiableObservableList());
+        filteredLessons = new FilteredList<>(new UniqueLessonList().asUnmodifiableObservableList());
+        studentsInfo = new ArrayObservableList<>(new UniqueStudentInfoList().asUnmodifiableObservableList());
     }
 
     public ModelManager() {
         this(new AddressBook(), new UserPrefs(), new Serenity());
     }
 
-    //=========== UserPrefs ==================================================================================
+    // =========== UserPrefs ==================================================================================
 
     @Override
     public void setUserPrefs(ReadOnlyUserPrefs userPrefs) {
@@ -103,7 +105,7 @@ public void setGuiSettings(GuiSettings guiSettings) {
         userPrefs.setGuiSettings(guiSettings);
     }
 
-    //=========== AddressBook ================================================================================
+    // =========== AddressBook ================================================================================
 
     @Override
     public Path getAddressBookFilePath() {
@@ -149,7 +151,7 @@ public void setPerson(Person target, Person editedPerson) {
         addressBook.setPerson(target, editedPerson);
     }
 
-    //=========== Serenity ================================================================================
+    // =========== Serenity ================================================================================
 
     @Override
     public Path getSerenityFilePath() {
@@ -206,6 +208,20 @@ public void updateLessonList() {
         }
     }
 
+    @Override
+    public void updateFilteredLessonList(Predicate<Lesson> predicate) {
+        requireAllNonNull(predicate);
+        this.filteredLessons.setPredicate(predicate);
+        updateStudentInfoList();
+    }
+
+    @Override
+    public void updateStudentInfoList() {
+        if (!filteredGroups.isEmpty() || !lessons.isEmpty()) {
+            this.studentsInfo.setAll(this.lessons.get(0).getStudentsInfoAsUnmodifiableObservableList());
+        }
+    }
+
     @Override
     public ObservableList<Group> getFilteredGroupList() {
         return filteredGroups;
@@ -221,6 +237,16 @@ public ObservableList<Lesson> getLessonList() {
         return lessons;
     }
 
+    @Override
+    public ObservableList<Lesson> getFilteredLessonList() {
+        return lessons;
+    }
+
+    @Override
+    public ObservableList<StudentInfo> getStudentInfoList() {
+        return studentsInfo;
+    }
+
     //=========== Filtered Person List Accessors =============================================================
 
     /**
diff --git a/src/main/java/seedu/address/model/group/Lesson.java b/src/main/java/seedu/address/model/group/Lesson.java
index b30f7582065..9eab9a409d7 100644
--- a/src/main/java/seedu/address/model/group/Lesson.java
+++ b/src/main/java/seedu/address/model/group/Lesson.java
@@ -1,5 +1,7 @@
 package seedu.address.model.group;
 
+import javafx.collections.ObservableList;
+
 import static seedu.address.commons.util.AppUtil.checkArgument;
 import static seedu.address.commons.util.CollectionUtil.requireAllNonNull;
 
@@ -14,6 +16,7 @@ public class Lesson {
 
     public static final String NAME_CONSTRAINT = "Class name cannot be empty";
     public static final String STUDENTS_INFO_CONSTRAINT = "Students information cannot be empty";
+
     private final String name;
     private final UniqueStudentInfoList studentsInfo;
 
@@ -34,17 +37,20 @@ boolean isValidName(String name) {
         return name.length() > 0;
     }
 
-    public UniqueStudentInfoList getStudentsInfo() {
-        return studentsInfo;
+    public String getName() {
+        return name;
     }
 
     boolean isValidStudentInfo(UniqueStudentInfoList studentsInfo) {
         return studentsInfo.size() > 0;
     }
 
+    public UniqueStudentInfoList getStudentsInfo() {
+        return studentsInfo;
+    }
 
-    public String getName() {
-        return name;
+    public ObservableList<StudentInfo> getStudentsInfoAsUnmodifiableObservableList() {
+        return studentsInfo.asUnmodifiableObservableList();
     }
 
     @Override
diff --git a/src/main/java/seedu/address/model/group/UniqueStudentInfoList.java b/src/main/java/seedu/address/model/group/UniqueStudentInfoList.java
index d033357d8ab..4828235e184 100644
--- a/src/main/java/seedu/address/model/group/UniqueStudentInfoList.java
+++ b/src/main/java/seedu/address/model/group/UniqueStudentInfoList.java
@@ -3,18 +3,18 @@
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import seedu.address.model.group.exceptions.DuplicateGroupException;
-import seedu.address.model.group.exceptions.GroupNotFoundException;
+import seedu.address.model.group.exceptions.DuplicateStudentInfoException;
+import seedu.address.model.group.exceptions.StudentInfoNotFoundException;
 
 import java.util.Iterator;
 import java.util.List;
-import java.util.Set;
 
 import static java.util.Objects.requireNonNull;
 import static seedu.address.commons.util.CollectionUtil.requireAllNonNull;
 
 /**
- * A list of Lessons that enforces uniqueness between its elements and does not allow nulls.
- * A Lesson is considered unique by comparing using {@code Lesson#equal(Object)}.
+ * A list of Students Info that enforces uniqueness between its elements and does not allow nulls.
+ * A Student Info is considered unique by comparing using {@code StudentInfo#equal(Object)}.
  */
 public class UniqueStudentInfoList implements Iterable<StudentInfo> {
 
@@ -36,7 +36,7 @@ public boolean contains(StudentInfo toCheck) {
     public void add(StudentInfo toAdd) {
         requireNonNull(toAdd);
         if (contains(toAdd)) {
-            throw new DuplicateGroupException();
+            throw new DuplicateStudentInfoException();
         }
         internalList.add(toAdd);
     }
@@ -55,11 +55,11 @@ public void setStudentInfo(StudentInfo target, StudentInfo editedStudentInfo) {
 
         int index = internalList.indexOf(target);
         if (index == -1) {
-            throw new GroupNotFoundException();
+            throw new StudentInfoNotFoundException();
         }
 
         if (!target.equals(editedStudentInfo) && contains(editedStudentInfo)) {
-            throw new DuplicateGroupException();
+            throw new DuplicateStudentInfoException();
         }
 
         internalList.set(index, editedStudentInfo);
@@ -68,10 +68,10 @@ public void setStudentInfo(StudentInfo target, StudentInfo editedStudentInfo) {
     /**
      * Removes the equivalent student info from the list. The student info must exist in the list.
      */
-    public void remove(Group toRemove) {
+    public void remove(StudentInfo toRemove) {
         requireNonNull(toRemove);
         if (!internalList.remove(toRemove)) {
-            throw new GroupNotFoundException();
+            throw new StudentInfoNotFoundException();
         }
     }
 
@@ -81,16 +81,16 @@ public void setStudentInfo(UniqueStudentInfoList replacement) {
     }
 
     /**
-     * Replaces the contents of this list with {@code studentInfos}.
-     * {@code studentInfos} must not contain duplicate student infos.
+     * Replaces the contents of this list with {@code studentsInfo}.
+     * {@code studentsInfo} must not contain duplicate students info.
      */
-    public void setStudentInfo(List<StudentInfo> studentInfos) {
-        requireAllNonNull(studentInfos);
-        if (!studentInfosAreUnique(studentInfos)) {
+    public void setStudentInfo(List<StudentInfo> studentsInfo) {
+        requireAllNonNull(studentsInfo);
+        if (!studentsInfoAreUnique(studentsInfo)) {
             throw new DuplicateGroupException();
         }
 
-        internalList.setAll(studentInfos);
+        internalList.setAll(studentsInfo);
     }
 
     /**
@@ -108,7 +108,7 @@ public Iterator<StudentInfo> iterator() {
     @Override
     public boolean equals(Object other) {
         return other == this // short circuit if same object
-                || (other instanceof UniqueGroupList // instanceof handles nulls
+                || (other instanceof UniqueStudentInfoList // instanceof handles nulls
                 && internalList.equals(((UniqueStudentInfoList) other).internalList));
     }
 
@@ -118,12 +118,12 @@ public int hashCode() {
     }
 
     /**
-     * Returns true if {@code studentInfos} contains only unique student infos.
+     * Returns true if {@code studentsInfo} contains only unique students info.
      */
-    private boolean studentInfosAreUnique(List<StudentInfo> studentInfos) {
-        for (int i = 0; i < studentInfos.size() - 1; i++) {
-            for (int j = i + 1; j < studentInfos.size(); j++) {
-                if (studentInfos.get(i).equals(studentInfos.get(j))) {
+    private boolean studentsInfoAreUnique(List<StudentInfo> studentsInfo) {
+        for (int i = 0; i < studentsInfo.size() - 1; i++) {
+            for (int j = i + 1; j < studentsInfo.size(); j++) {
+                if (studentsInfo.get(i).equals(studentsInfo.get(j))) {
                     return false;
                 }
             }
diff --git a/src/main/java/seedu/address/model/group/exceptions/DuplicateStudentException.java b/src/main/java/seedu/address/model/group/exceptions/DuplicateStudentException.java
index b4f81760740..e0593c59606 100644
--- a/src/main/java/seedu/address/model/group/exceptions/DuplicateStudentException.java
+++ b/src/main/java/seedu/address/model/group/exceptions/DuplicateStudentException.java
@@ -9,4 +9,5 @@ public class DuplicateStudentException extends RuntimeException {
     public DuplicateStudentException() {
         super("Operation would result in duplicate Student!");
     }
+
 }
diff --git a/src/main/java/seedu/address/model/group/exceptions/DuplicateStudentInfoException.java b/src/main/java/seedu/address/model/group/exceptions/DuplicateStudentInfoException.java
new file mode 100644
index 00000000000..7fb996c9060
--- /dev/null
+++ b/src/main/java/seedu/address/model/group/exceptions/DuplicateStudentInfoException.java
@@ -0,0 +1,13 @@
+package seedu.address.model.group.exceptions;
+
+/**
+ * Signals that the operation will result in duplicate Student Info
+ * (Student Info are considered duplicates if they have the same student identity).
+ */
+public class DuplicateStudentInfoException extends RuntimeException {
+
+    public DuplicateStudentInfoException() {
+        super("Operation would result in duplicate Student Info!");
+    }
+
+}
diff --git a/src/main/java/seedu/address/model/group/exceptions/StudentInfoNotFoundException.java b/src/main/java/seedu/address/model/group/exceptions/StudentInfoNotFoundException.java
new file mode 100644
index 00000000000..deb779cddf2
--- /dev/null
+++ b/src/main/java/seedu/address/model/group/exceptions/StudentInfoNotFoundException.java
@@ -0,0 +1,8 @@
+package seedu.address.model.group.exceptions;
+
+/**
+ * Signals that the operation is unable to find the specified student info.
+ */
+public class StudentInfoNotFoundException extends RuntimeException {
+
+}
diff --git a/src/main/java/seedu/address/model/group/exceptions/StudentNotFoundException.java b/src/main/java/seedu/address/model/group/exceptions/StudentNotFoundException.java
index aef4cdeaa31..3a6f9e6d8f0 100644
--- a/src/main/java/seedu/address/model/group/exceptions/StudentNotFoundException.java
+++ b/src/main/java/seedu/address/model/group/exceptions/StudentNotFoundException.java
@@ -1,7 +1,7 @@
 package seedu.address.model.group.exceptions;
 
 /**
- * Signals that the operation is unable to find the specified group.
+ * Signals that the operation is unable to find the specified student.
  */
 public class StudentNotFoundException extends RuntimeException {