Have any of you seen Barry Cipra's book Misteaks: and how to find them before the teacher does
and used it in class?
I think it's a wonderful book but I haven't found many ways to incorporate it. Instead, I take the ideas from it (e.g. that you should estimate the area of the region before finding the integral) and teach them as the occasion arises (e.g. when a student makes a mistake, I suggest that it could have been caught if the answer had been checked in such-and-so a way).