Today, in Calculus, we practiced taking derivatives of trickier functions, like those with radicals, or with exponents in the denominator. We did this by doing a folding story – each student did a step in the problem, then folded the paper so that only their work was visible. Then, they passed their paper to the next person who did the next step, and so on. At the end, they opened up the whole thing to see if the final answer matches he actual answer. The goal was to help them practice these derivatives, but also to help them see common mistakes, and practice finding mistakes in their work. I explained the instructions poorly last year with this and it was a mess – it went much smoother this year!