https://chromewebstore.google.com/detail/noppi-note-practice-progr/igpkebkjfcfabiiihjbgdfogjnefppgk?hl=en
Noppi - note practice program for instruments - Chrome Web Store
Noppi is a great app for learning notes on a music sheet. It is also possible to answer by trombone slide position.
for instrumentsnoppinotepracticeprogram