Given a diagnosis, pick the right drill. This is the apex of the curriculum — turning a label into the next 5-minute action.
Each trial gives you a diagnosed error and 4 candidate drills. Pick the drill that best targets the error — picking a drill from a different category is wrong even if it's a useful exercise.
4 trials. Pass at 3/4.If you pass, you've closed the curriculum loop: error → diagnosis → rescue drill.