Teaching music intervals can be hard, especially when facing students with limited musical backgrounds. Not only must students know their key signatures, but they must remember the differences between minor, major, diminished, and augmented tonalities, all the while using flats, sharps, double flats, and double sharps... But don't despair, because here is a theory crib sheet that will help you towards teaching this topic very efficiently. I first came up with this poster during a theory class. M