I took my strategy from the maths department at totteridge academy. I pick 5 students who made an error and prepare a shadow question for them. I give the class time in small groups to fix errors and then reveal the shadow questions, if the kids can now answer them, their whole group get praised.

I like these conversations. The biggest question I always have about maths is: why is differentiation so convenient??! And how does integration actually work. And why are they inverses? I need a short, lucid book to read about this if you know any?