AP CSA

The AP CSA review game where they name the right crash

957 terms · all ten units · free, no student accounts

One round from AP Computer Science A — Unit 10: Recursion

Four students see

StackOverflowError

Error thrown when recursive calls exhaust the execution call stack memory limit.

The fifth sees

Call-stack-exhaustion

That is all they get — a hint, not the term the other four are holding — and they have to describe it first.

The Mole knows something ran out of room. They can describe a program eating itself alive and sound exactly right — and then call it an OutOfMemoryError, which is the heap, not the stack. Anyone who has written a runaway recursion knows the difference on sight.

Recognizing a word is not knowing it

Naming the failure is the job. A student who can pick it off a list but calls every crash "out of memory" has not learned what actually went wrong.

Twenty-five minutes, start to finish

1Pick the unitChoose one of all ten units, or the whole course.

2They join with a codeA room code and a nickname. Nothing to install, no accounts to make.

3The class splitsUp to 45 students, split into small rooms so everyone actually speaks.

4You watch one boardEvery room on one screen — who is playing, who is stuck, who is winning.

Run it with one class

957 terms are already written and ready. Open the course, pick a unit, and put the code on the board.

Free. No paid tier, no trial, and students never make an account. What your IT department will ask