Today I prepared a simple school planner. In the files, you can create your weekly schedules and keep an eye on tasks.
Tab 1: Lessons
Here you fill out all your lessons and basic information about the teachers. This is also a data source for the list in the second tab.
Tab 2: Plan
Here you can find two things:
Schedule -> Week overview. Don't forget to add your timeslots in Cells A3-A25.
Tasklist -> where you keep an eye on homework, exams, etc. You can slice the data with the filters.
If you want to use it:
MS Excel downloads the files.
Google Sheets, click the link, and then in the top left corner, in the menu bar, click FILE -> MAKE A COPY.