Website
http://www.artusi.xyz
Artusi is a suite of digital workbooks to help students learn the fundamental skills of music theory faster, better, and more accurately than before so they can spend more time pursuing the creative mission of music-making and music study. All Artusi online services are free for schools affected by closures until June 30. To get an account, email support@artusi.xyz
http://www.artusi.xyz
Free