TL;DR
Use repetition for work that follows a pattern, then check which occurrences an edit will affect.
Before you begin
Start from a task you can edit in your own planner.
Key points
Open the task's repeat action.
Choose the recurrence offered for your situation, such as days, weeks or cycle days.
Check the generated dates against holidays and changes in the school schedule.
When editing or deleting a repeated task, read the scope of the confirmation before applying it.
Related help
Manage your schedule and join optional classes · Find missing tasks and restore completed or deleted work