Walk the cycle
A repeating tape for learning the keys away from the piano. Pick a measure, say the next key, then reveal it.
Tap any measure to quiz yourself from there.
Major
up a perfect fourthprompt trackMinor
up a perfect fourthMajor cycle · measure 1
What comes after C?
Say the next key out loud before you reveal it.
The tape repeats at measure 13. The familiar spellings keep the cycle readable; some keys are enharmonic equivalents.