Before I began the workshop my impression of this curriculum was fairly positive - I heard that it was mostly a set of lab activities that encouraged students to think, write, and dialog with each other about math topics so that they would develop a deeper understanding of the material. It sounds interesting to me but I'd never had an in-depth explanation of its intricacies nor guided instruction in how to use it.
Enter: my new colleagues at the Brooklyn School for Collaborative Studies. They started using CPM a few years ago and have seen some very interesting results. Two of them are helping to lead the workshop I am taking.
Thus far we have used a variety of different methods, all neatly described on the eBook website (sorry - no link; it's only accessible to paying members) and I can tell I like how it runs already. I will update more as I go!