Create drills for clarinet, flute, & saxophone fingerings. If those were on the site I'd subscribe.
I love the theory drills, but the fingering drills would be the deal closer for me. That would be a truly invaluable addition to my teaching, and I'd subscribe in a heartbeat. Until then, it's not quite worth it to have to subscribe and still send my students to different sites to do both.
Standard flute plays 3 octaves up from middle C, and use only the treble clef.
Scott Morrise commented
Amen! Brass Fingerings too!
I agree 100%!