Luckily for most school percussionists, their instruments usually stay at school! They may need a drum pad and possibly a spare set of drumsticks for home, as well as a metronome. Here are a few suggestions available on Amazon or as an app:
Digital TipBook - If you have a smartphone or tablet and would like to learn more about your instrument, The TipBook Company has digital book downloads available for most instruments (free on iOS, $0.99 on Android).
Here is a great clip to help perfect your "double roll"