You won’t be able to delete timetable slots if you’ve begun to take attendance. We advise ending the timetable slot first then importing your new timetable or and adding a new slot from the course (shown in the section at the top of this article).
Go to School > Timetable > Timetable Administration > Timetable Slots. You can filter on this page if you only want to see a specific year group, course or lessons taught by a certain teacher.
To delete timetable slots, you can use the tick box's next to the lessons you want to remove. Click the Bulk action button and select Delete Timetable Slots.
Check you've selected the right slots, then click Delete.