Music reward board for elementary music classes! Found this idea from another pinner and loved it, just modified it for my room and colors!
Music Symbols and Terms
Music dynamics Great assessment sheet for K-1 "voice types" and where to use them.
14 Common Musical Terms All Piano Players Need to Know: http://takelessons.com/blog/sheet-music-terms-piano-z06?utm_source=social&utm_medium=blog&utm_campaign=pinterest
Fun and Learn Music - Fun Music Worksheets and Games for Music Theory
This website has a bunch of different music vocab and history charts for the classroom. A good project for middle and high school students might be to have them design their own posters for the classroom using the knowledge they've gained in class.
Keyboard / Piano Stickers up to 61 KEYS the best way to by Hannott