These games/quizzes below will get you REALLY quick at knowing what notes you are playing high up there above the stave.
1. A quiz on a simple octave to a high F (this is the easiest one to start off with)
3. A quiz with sharps up to high B#
4. A quiz with flats up to high Bb
Put a user name (not your real one) in to the site to record your scores and then I can see if anyone can beat me (I’m hypercoolers!)
Good luck!