Why questions beat rereading
Twenty minutes, with the notes in front of you
Rereading feels like studying
Reading a page again is comfortable, and it makes the material feel familiar, which is easy to mistake for knowing it. Being asked a question is uncomfortable, and the discomfort is the part that works: pulling something out of memory is what makes it easier to pull out next time.
You do not need to know the subject to write good questions about it. You need the page of notes and a bit of stubbornness. Everything below is done from the notes — nothing here asks a tool for anything.