Here is a freebie!
I find it super helpful for combined classes where sometimes I have kids playing band instruments and some kids not... My recorders read flute music and play it on their recorder. This is the first time I've tried it, once they get the hang of the fingering chart they are pretty independant and are reading real band music!!
I know different areas teach differently, so I have both fixed do and mobile do!
I also use ukuleles as basses... but stay tuned for that! :)