Balloon Popping meter: as the children sing well, a leader pulls on the ribbon from behind. If the kids have mastered a song, the balloon makes it to the top, where it is popped. Fun idea for review, but potentially irreverent? If all the songs are mastered, the kids get tootsie "pops."
Examples of using Aurasma (Augmented Reality) in the elementary music classroom to explore composers and listen to gifted young performers. Aurasma is free for iPad and web site. Video examples included. QR codes... so last year! :)