diff --git a/src/web/app/components/sessions-table/send-reminders-to-respondents-modal/send-reminders-to-respondents-modal.component.spec.ts b/src/web/app/components/sessions-table/send-reminders-to-respondents-modal/send-reminders-to-respondents-modal.component.spec.ts
index 67ef16161b5..e8213eb6aa1 100644
--- a/src/web/app/components/sessions-table/send-reminders-to-respondents-modal/send-reminders-to-respondents-modal.component.spec.ts
+++ b/src/web/app/components/sessions-table/send-reminders-to-respondents-modal/send-reminders-to-respondents-modal.component.spec.ts
@@ -1,9 +1,13 @@
 import { HttpClientTestingModule } from '@angular/common/http/testing';
-import { Component } from '@angular/core';
+import { Component, DebugElement } from '@angular/core';
 import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
 import { FormsModule } from '@angular/forms';
+import { By } from '@angular/platform-browser';
 import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
 import { SendRemindersToRespondentsModalComponent } from './send-reminders-to-respondents-modal.component';
+import { createBuilder } from '../../../../test-helpers/generic-builder';
+import { InstructorListInfoTableRowModel, StudentListInfoTableRowModel }
+  from '../respondent-list-info-table/respondent-list-info-table-model';
 import { RespondentListInfoTableComponent } from '../respondent-list-info-table/respondent-list-info-table.component';
 
 @Component({ selector: 'tm-ajax-preload', template: '' })
@@ -13,6 +17,42 @@ describe('SendRemindersToRespondentsModalComponent', () => {
   let component: SendRemindersToRespondentsModalComponent;
   let fixture: ComponentFixture<SendRemindersToRespondentsModalComponent>;
 
+  const studentModelBuilder = createBuilder<StudentListInfoTableRowModel>({
+    email: 'student@gmail.com',
+    name: 'Student',
+    teamName: 'Team A',
+    sectionName: 'Section 1',
+    hasSubmittedSession: false,
+    isSelected: false,
+  });
+
+  const instructorModelBuilder = createBuilder<InstructorListInfoTableRowModel>({
+    email: 'instructor@gmail.com',
+    name: 'Instructor',
+    hasSubmittedSession: false,
+    isSelected: false,
+  });
+
+  const selectAllStudentCheckBox = (): DebugElement => {
+    return fixture.debugElement.query(By.css('#remindAllStu'));
+  };
+
+  const selectAllNotSubmittedStudentCheckBox = (): DebugElement => {
+    return fixture.debugElement.query(By.css('#remindNotSubmittedStu'));
+  };
+
+  const selectAllInstructorCheckBox = (): DebugElement => {
+    return fixture.debugElement.query(By.css('#remindAllIns'));
+  };
+
+  const selectAllNotSubmittedInstructorCheckBox = (): DebugElement => {
+    return fixture.debugElement.query(By.css('#remindNotSubmittedIns'));
+  };
+
+  const sendCopyToInsCheckBox = (): DebugElement => {
+    return fixture.debugElement.query(By.css('#sendCopyToIns'));
+  };
+
   beforeEach(waitForAsync(() => {
     TestBed.configureTestingModule({
       declarations: [
@@ -38,4 +78,298 @@ describe('SendRemindersToRespondentsModalComponent', () => {
   it('should create', () => {
     expect(component).toBeTruthy();
   });
+
+  it('changeSelectionStatusForAllStudentsHandler: should set all isSelected to true if not all are selected', () => {
+    component.studentListInfoTableRowModels = [
+      studentModelBuilder.isSelected(true).build(),
+      studentModelBuilder.isSelected(false).build(),
+      studentModelBuilder.isSelected(true).build(),
+    ];
+
+    const changeSelectionStatusForAllStudentsHandlerSpy =
+      jest.spyOn(component, 'changeSelectionStatusForAllStudentsHandler');
+
+    fixture.detectChanges();
+
+    selectAllStudentCheckBox().nativeElement.click();
+    expect(changeSelectionStatusForAllStudentsHandlerSpy).toHaveBeenCalledTimes(1);
+    expect(component.studentListInfoTableRowModels).toStrictEqual([
+      studentModelBuilder.isSelected(true).build(),
+      studentModelBuilder.isSelected(true).build(),
+      studentModelBuilder.isSelected(true).build(),
+    ]);
+  });
+
+  it('changeSelectionStatusForAllStudentsHandler: should set all isSelected to false'
+    + 'if select all checkbox is clicked twice', () => {
+      component.studentListInfoTableRowModels = [
+        studentModelBuilder.isSelected(true).build(),
+        studentModelBuilder.isSelected(true).build(),
+        studentModelBuilder.isSelected(true).build(),
+      ];
+
+      const changeSelectionStatusForAllStudentsHandlerSpy =
+        jest.spyOn(component, 'changeSelectionStatusForAllStudentsHandler');
+
+      fixture.detectChanges();
+
+      selectAllStudentCheckBox().nativeElement.click();
+      selectAllStudentCheckBox().nativeElement.click();
+      expect(changeSelectionStatusForAllStudentsHandlerSpy).toHaveBeenCalledTimes(2);
+      expect(component.studentListInfoTableRowModels).toStrictEqual([
+        studentModelBuilder.isSelected(false).build(),
+        studentModelBuilder.isSelected(false).build(),
+        studentModelBuilder.isSelected(false).build(),
+      ]);
+    });
+
+  it('changeSelectionStatusForAllYetSubmittedStudentsHandler: should set all isSelected to true'
+    + 'for all students that has not submitted session', () => {
+      component.studentListInfoTableRowModels = [
+        studentModelBuilder.isSelected(false).hasSubmittedSession(false).build(),
+        studentModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        studentModelBuilder.isSelected(false).hasSubmittedSession(false).build(),
+      ];
+
+      const changeSelectionStatusForAllYetSubmittedStudentsHandlerSpy =
+        jest.spyOn(component, 'changeSelectionStatusForAllYetSubmittedStudentsHandler');
+
+      fixture.detectChanges();
+
+      selectAllNotSubmittedStudentCheckBox().nativeElement.click();
+      expect(changeSelectionStatusForAllYetSubmittedStudentsHandlerSpy).toHaveBeenCalledTimes(1);
+      expect(component.studentListInfoTableRowModels).toStrictEqual([
+        studentModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+        studentModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        studentModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+      ]);
+    });
+
+  it('changeSelectionStatusForAllInstructorsHandler: should set all isSelected to true'
+    + 'if not all are selected', () => {
+      component.instructorListInfoTableRowModels = [
+        instructorModelBuilder.isSelected(true).build(),
+        instructorModelBuilder.isSelected(false).build(),
+        instructorModelBuilder.isSelected(true).build(),
+      ];
+
+      const changeSelectionStatusForAllInstructorsHandlerSpy =
+        jest.spyOn(component, 'changeSelectionStatusForAllInstructorsHandler');
+
+      fixture.detectChanges();
+
+      selectAllInstructorCheckBox().nativeElement.click();
+      expect(changeSelectionStatusForAllInstructorsHandlerSpy).toHaveBeenCalledTimes(1);
+      expect(component.instructorListInfoTableRowModels).toStrictEqual([
+        instructorModelBuilder.isSelected(true).build(),
+        instructorModelBuilder.isSelected(true).build(),
+        instructorModelBuilder.isSelected(true).build(),
+      ]);
+    });
+
+  it('changeSelectionStatusForAllInstructorsHandler: should set all isSelected to false'
+    + 'if select all checkbox is clicked twice', () => {
+      component.instructorListInfoTableRowModels = [
+        instructorModelBuilder.isSelected(true).build(),
+        instructorModelBuilder.isSelected(true).build(),
+        instructorModelBuilder.isSelected(true).build(),
+      ];
+
+      const changeSelectionStatusForAllInstructorsHandlerSpy =
+        jest.spyOn(component, 'changeSelectionStatusForAllInstructorsHandler');
+
+      fixture.detectChanges();
+
+      selectAllInstructorCheckBox().nativeElement.click();
+      selectAllInstructorCheckBox().nativeElement.click();
+      expect(changeSelectionStatusForAllInstructorsHandlerSpy).toHaveBeenCalledTimes(2);
+      expect(component.instructorListInfoTableRowModels).toStrictEqual([
+        instructorModelBuilder.isSelected(false).build(),
+        instructorModelBuilder.isSelected(false).build(),
+        instructorModelBuilder.isSelected(false).build(),
+      ]);
+    });
+
+  it('changeSelectionStatusForAllYetSubmittedInstructorsHandler: should set all isSelected to true'
+    + 'for all students that has not submitted session', () => {
+      component.instructorListInfoTableRowModels = [
+        instructorModelBuilder.isSelected(false).hasSubmittedSession(false).build(),
+        instructorModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        instructorModelBuilder.isSelected(false).hasSubmittedSession(false).build(),
+      ];
+
+      const changeSelectionStatusForAllYetSubmittedInstructorsHandlerSpy =
+        jest.spyOn(component, 'changeSelectionStatusForAllYetSubmittedInstructorsHandler');
+
+      fixture.detectChanges();
+
+      selectAllNotSubmittedInstructorCheckBox().nativeElement.click();
+      expect(changeSelectionStatusForAllYetSubmittedInstructorsHandlerSpy).toHaveBeenCalledTimes(1);
+      expect(component.instructorListInfoTableRowModels).toStrictEqual([
+        instructorModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+        instructorModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        instructorModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+      ]);
+    });
+
+  it('changeSelectionStatusForSendingCopyToInstructorHandler: should toggle isSendingCopyToInstructorHandler', () => {
+    const changeSelectionStatusForSendingCopyToInstructorHandlerSpy =
+      jest.spyOn(component, 'changeSelectionStatusForSendingCopyToInstructorHandler');
+
+    component.isSendingCopyToInstructor = true;
+    fixture.detectChanges();
+
+    sendCopyToInsCheckBox().nativeElement.click();
+    expect(changeSelectionStatusForSendingCopyToInstructorHandlerSpy).toHaveBeenCalledTimes(1);
+    expect(component.isSendingCopyToInstructor).toBeFalsy();
+  });
+
+  it('collateReminderResponseHandler: should return correct ReminderResponseModel', () => {
+    component.studentListInfoTableRowModels = [
+      studentModelBuilder.name('A').isSelected(true).build(),
+      studentModelBuilder.name('B').isSelected(false).build(),
+      studentModelBuilder.name('C').isSelected(true).build(),
+    ];
+
+    component.instructorListInfoTableRowModels = [
+      instructorModelBuilder.name('A').isSelected(false).build(),
+      instructorModelBuilder.name('B').isSelected(false).build(),
+      instructorModelBuilder.name('C').isSelected(true).build(),
+    ];
+
+    component.isSendingCopyToInstructor = false;
+
+    fixture.detectChanges();
+
+    const expectedRespondentsToSend = [
+      studentModelBuilder.name('A').isSelected(true).build(),
+      studentModelBuilder.name('C').isSelected(true).build(),
+      instructorModelBuilder.name('C').isSelected(true).build(),
+    ];
+
+    expect(component.collateReminderResponseHandler()).toStrictEqual({
+      respondentsToSend: expectedRespondentsToSend,
+      isSendingCopyToInstructor: false,
+    });
+  });
+
+  it('isAllStudentsSelected: should return true and checkbox should be checked'
+    + 'if all students are selected', async () => {
+      component.studentListInfoTableRowModels = [
+        studentModelBuilder.isSelected(true).build(),
+        studentModelBuilder.isSelected(true).build(),
+        studentModelBuilder.isSelected(true).build(),
+      ];
+
+      fixture.detectChanges();
+      await fixture.whenStable();
+
+      expect(component.isAllStudentsSelected).toBeTruthy();
+      expect(selectAllStudentCheckBox().nativeElement.checked).toBeTruthy();
+    });
+
+  it('isAllStudentsSelected: should return false and checkbox should not be checked'
+    + 'if not all students are selected', async () => {
+      component.studentListInfoTableRowModels = [
+        studentModelBuilder.isSelected(true).build(),
+        studentModelBuilder.isSelected(false).build(),
+        studentModelBuilder.isSelected(true).build(),
+      ];
+
+      fixture.detectChanges();
+      await fixture.whenStable();
+
+      expect(component.isAllStudentsSelected).toBeFalsy();
+      expect(selectAllStudentCheckBox().nativeElement.checked).toBeFalsy();
+    });
+
+  it('isAllYetToSubmitStudentsSelected: should return true and checkbox should be checked'
+    + 'if all non-submitted students are selected', async () => {
+      component.studentListInfoTableRowModels = [
+        studentModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+        studentModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        studentModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+      ];
+
+      fixture.detectChanges();
+      await fixture.whenStable();
+
+      expect(component.isAllYetToSubmitStudentsSelected).toBeTruthy();
+      expect(selectAllNotSubmittedStudentCheckBox().nativeElement.checked).toBeTruthy();
+    });
+
+  it('isAllYetToSubmitStudentsSelected: should return false and checkbox should not be'
+    + 'checked if not all non-submitted students are selected', async () => {
+      component.studentListInfoTableRowModels = [
+        studentModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+        studentModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        studentModelBuilder.isSelected(false).hasSubmittedSession(false).build(),
+      ];
+
+      fixture.detectChanges();
+      await fixture.whenStable();
+
+      expect(component.isAllYetToSubmitStudentsSelected).toBeFalsy();
+      expect(selectAllNotSubmittedStudentCheckBox().nativeElement.checked).toBeFalsy();
+    });
+
+  it('isAllYetToSubmitStudentsSelected: should return false and checkbox should not be'
+    + 'checked if all students have submitted', async () => {
+      component.studentListInfoTableRowModels = [
+        studentModelBuilder.isSelected(true).hasSubmittedSession(true).build(),
+        studentModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        studentModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+      ];
+
+      fixture.detectChanges();
+      await fixture.whenStable();
+
+      expect(component.isAllYetToSubmitStudentsSelected).toBeFalsy();
+      expect(selectAllNotSubmittedStudentCheckBox().nativeElement.checked).toBeFalsy();
+    });
+
+  it('isAllYetToSubmitInstructorsSelected: should return true and checkbox should be checked'
+    + 'if all non-submitted instructors are selected', async () => {
+      component.instructorListInfoTableRowModels = [
+        instructorModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+        instructorModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        instructorModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+      ];
+
+      fixture.detectChanges();
+      await fixture.whenStable();
+
+      expect(component.isAllYetToSubmitInstructorsSelected).toBeTruthy();
+      expect(selectAllNotSubmittedInstructorCheckBox().nativeElement.checked).toBeTruthy();
+    });
+
+  it('isAllYetToSubmitInstructorsSelected: should return false and checkbox should not be checked'
+    + 'if not all non-submitted instructors are selected', async () => {
+      component.instructorListInfoTableRowModels = [
+        instructorModelBuilder.isSelected(true).hasSubmittedSession(false).build(),
+        instructorModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        instructorModelBuilder.isSelected(false).hasSubmittedSession(false).build(),
+      ];
+
+      fixture.detectChanges();
+      await fixture.whenStable();
+
+      expect(component.isAllYetToSubmitInstructorsSelected).toBeFalsy();
+      expect(selectAllNotSubmittedInstructorCheckBox().nativeElement.checked).toBeFalsy();
+    });
+
+  it('isAllYetToSubmitInstructorsSelected: should return false and checkbox should not be'
+    + 'checked if all instructors have submitted', async () => {
+      component.instructorListInfoTableRowModels = [
+        instructorModelBuilder.isSelected(true).hasSubmittedSession(true).build(),
+        instructorModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+        instructorModelBuilder.isSelected(false).hasSubmittedSession(true).build(),
+      ];
+
+      fixture.detectChanges();
+      await fixture.whenStable();
+
+      expect(component.isAllYetToSubmitInstructorsSelected).toBeFalsy();
+      expect(selectAllNotSubmittedInstructorCheckBox().nativeElement.checked).toBeFalsy();
+    });
 });