Printable PDFs that show a shape before they name it. Made for people who taught themselves and hit the wall where memorised steps run out.
You can play the songs. You still can't play the piano. This 45-page visual workbook teaches the instrument underneath the songs — transpose on the spot, work a tune out by ear, improvise eight bars that sound deliberate.
The next workbook is in progress. If there's a skill you taught yourself and never properly understood, tell us what it was — that's how this list grows.