CSA
AP Computer Science A
Object-oriented programming in Java: control flow, classes, arrays, inheritance, and recursion.
What do you want to do today?
Pick any — no gatingDaily Mission
10 adaptive questions
Mixed difficulty across every unit. Pick this if you don't know where to start.
Topic Drill
Pick a unit or topic
Pick any unit and drill 10 questions on it.
Speed Round
8 questions, 60-second timer
Warm-up buzzer mode — only easier items. Great for commute or before class.
Boss Battle
Hardest 5 in your weakest unit
Take the diagnostic first so Lumi knows your weakest unit.
Mock Exam
Full-length timed simulation
50 questions in 90 minutes with the official score curve. Best in the last 4 weeks before exam day.
Calibrate
8 questions, predicted score update
Lightning diagnostic. Optional — but unlocks Boss Battle and personalized plan.
Units
10 units · 10 on examEmbed this on your site — free
Teachers & bloggers: drop this interactive mini-diagnostic into any page. No sign-up, works in any website or LMS that allows iframes.