USM allows you to define time period for timetable & create timetable for classes in school. This feature is available in Timetable module which can be accessed by clicking on the menu bar on the top right of the screen. 

Step 1. Click on the menu bar on the top right of the screen and select the Timetable module.

Step 2. Click on the Manage Timetable option available on the left of the screen.

Step 3. Add & modify new timetable. Click on the option Create New Timetable on the right of the screen. 

Step 4. Fill up the form. After filling the form, click on the save changes option on the bottom right of the dialog box.

Step 5. After saving the timetable, click on the create class timetable option in the list of timetables.

Step 5. When you click on create class timetable, the following screen appear on your screen.

Step 6. Select class for which you want to create timetable. After selecting the class, the following screen appears.

Step 7. Select the subject from the subject drop down. When you select the subject teacher, list appears below the selected subject.

Step 8. Select the teacher from the teacher drop down. Click on the check box to assign that period to selected teacher. you can select multiple period to assign selected teacher. After selecting the check box click on the Assign & Save button to save selected period to teacher.

Note: If the selected teacher has already been assigned a selected period in other class then a Error message appears on your screen as shown in below figure.