Right click in the space you want to add your duty.

Select New Appointment.

Enter the start and end time.

Select the recurrence pattern to weekly so the appointment shows up on your timetable every week.

Type the name of your duty in the subject box.

Select the end by date using the calendar for when you want the appointments to no longer appear on your timetable.

Check that your screen looks like the picture to the below before clicking Accept.

Your screen will now refresh and show your duty as an orange box on a weekly basis.

Select a class to open up the class register.

Along the top, select the History button.

Once loaded, you should be able to review the attendance history of your class from the beginning of the academic year with an overall attendance percentage.