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Create, edit and delete lessons

Add a lesson to your calendar, open it to edit the plan and schedule, mark it as prepared, and delete it when you no longer need it.

4 min readUpdated July 30, 2026

By the end of this guide you'll be able to create a lesson, edit it, mark it as prepared, and delete it when needed.

Before you start

You need at least one school, subject and class. If you haven't set those up yet, finish the onboarding walkthrough first.

Create a lesson

From the + button

  1. 1

    Open the Calendar

    From the sidebar, go to the Calendar.

  2. 2

    Click + and choose New Lesson

    Tap the + button (bottom-right). Choose New Lesson.

    Click + then choose New Lesson
  3. 3

    Fill in the details

    In Create New Lesson, complete:

    • Lesson Title
    • School
    • Subject
    • Grade (your class)
    • Date, Start Time and End Time

    You can optionally set Repeat if the lesson should recur.

    Fill in the required fields, then click Create Lesson

    Click Create Lesson.

If a matching timetable exists for that school, subject, class and date, GapFiller may ask whether to link the lesson to it. Linking keeps the lesson connected to your weekly schedule.

From an empty slot

You can also click an empty time slot (Day or Week view) or an empty day (Month view). That opens Create New Event — switch the type to Lesson, fill in the same details, then click Create Event.

Prefer bulk lessons instead? Set up a timetable and let GapFiller generate them for the whole date range — then open each one to add the plan.

Edit a lesson

  1. 1

    Open the lesson

    Click the lesson on your calendar. The lesson panel opens.

  2. 2

    Update what you need

    You can change the title, school, subject, class and Schedule (date and times).

    Use the tabs to work on the rest:

    Open a lesson to edit the plan, materials, homework and more
  3. 3

    Save your changes

    Click Save Changes when you're done.

If the lesson is linked to a timetable and you change school, subject or class, GapFiller may ask you to Link to timetable and save or Detach and save.

Mark as prepared

In the lesson panel, toggle between Needs Prep and Prepared.

Prepared lessons stand out on the calendar (stronger colour and a checkmark) when Show preparation tracking is enabled in your profile preferences.

Delete a lesson

  1. 1

    Open the lesson and choose Delete

    Open the lesson, then click Delete Lesson.

  2. 2

    Confirm

    For a normal lesson, confirm: Are you sure you want to delete this lesson? This action cannot be undone.

    Confirm before deleting — this cannot be undone for a single lesson

If the lesson is part of a recurring series, you'll see Delete Recurring Event with three choices:

  • This event only
  • This and following events
  • All events in the series

Choose carefully — deleting following or all events removes more than one date from your calendar.

What's next?

Related guides

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Move a lesson to a different day or time by dragging it on the calendar, or by editing the schedule in the lesson panel.

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Mark a calendar lesson as an exam, find exams with filters, attach materials, and plan exams from your curriculum.

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