Set the schedule mode
                                        For a school that you want to build an elementary master schedule, set the schedule mode to elementary.
To set the schedule mode:
- Log on to the School view.
 - Click the School tab.
 - On the Setup side-tab, click Preferences.
 - Click the Category drop-down to select Schedule.
 - At the Schedule mode drop-down, do one of the following:
 - Select Elementary.
 - If you plan to use elementary and secondary scheduling for your school, select Both.