Every student’s initial graph was wrong. No one got it exactly right the first time. But Function Carnival doesn’t display a percent score or hint tokens or some kind of Bayesian probability they’ll get the next graph right. It just shows students what their graph means for that ride. Then it lets them revise.
David Cox screen-recorded the teacher view of all his students’ graphs. This is the result. I love it.
BTW. I’m hardly unbiased here, having played a supporting role in the development of Function Carnival.