A single file composition sketchbook where students create their own pentatonic melodies, hear them played back, and export real sheet music. No accounts, no installs, works offline on any smartboard or tablet. Send a copy to your students and they can compose at home on a computer, tablet, even a phone! Why pentatonic? Every combination of do, re, mi, so, la sounds musical. There are no wrong notes. That means kindergartners can compose something beautiful on their first try, and fifth grader