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CSA
AP Computer Science A
Object-oriented programming in Java: control flow, classes, arrays, inheritance, and recursion.
Start with the Daily Mission and I'll learn your style — or run the 8-min Calibrate first if you want a predicted score right away.
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.
~12 minStart missionarrow_forward
Topic Drill
Pick a unit or topic
Pick any unit and drill 10 questions on it.
~15 minPick a unitarrow_forward
Speed Round
8 questions, 60-second timer
Warm-up buzzer mode — only easier items. Great for commute or before class.
60 sec60-second buzzerarrow_forward
Boss Battle
Hardest 5 in your weakest unit
Take the diagnostic first so Lumi knows your weakest unit.
~10 minCalibrate first to unlock
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.
~90 minStart mockarrow_forward
Calibrate
8 questions, predicted score update
Lightning diagnostic. Optional — but unlocks Boss Battle and personalized plan.
~8 min8-min diagnosticarrow_forward