Screen time is an app that lets you limit time your child/student uses iPhone or iPad. You set the time, press start, and pass it to your kiddo. When time expires, it stops the game! There's an app for everything!
Bowmaster makes me feel like I'm part of the merry men of Sherwood, practicing on an archery field. The game takes you through different terrains, opposing different (and better) opponents. Scoring is rated on your accuracy and the difficulty of the shot.
iPad app: Noteworks - great note reading app with lots of setting options (clefs, difficulty, solfa or note names). You can also set up multiple users within the game so it's ideal for those using a class set of iPads.