AP Calculus BC

The AP Calc BC review game where they pick the right derivative

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

One round from AP Calculus BC — Unit 9: Parametric Equations, Polar Coordinates, and Vector-Valued Functions

Four students see

Horizontal Tangent Parametric

Occurs where dy/dt equals zero while dx/dt does not.

The fifth sees

Flat-spot

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 the curve goes flat somewhere. That is enough to describe a path levelling off and sound completely right — and then they have to say which derivative is the one equal to zero. It is a coin flip, and talking does not improve the odds.

Recognizing a word is not knowing it

BC is where the flipped answer looks exactly like the correct one. A student who says dx/dt when they meant dy/dt has lost the point, and a bubbled answer never tells them which they meant.

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

999 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