learnbybits beta
Know what you know.
One number per set: your predicted test score if a test covered everything today — including what you haven't seen. It moves when you answer. It decays when you don't.
A number that argues with you.
Predicted test score is computed, not guessed — every concept in the set counts, seen and unseen. Answer, and the number moves. Wait, and it decays. The point is knowing where you stand on the whole set, right now.