During the past few years I have had several posts about presentations that I have done regarding creating space for the improvement of practice. Specifically the work with teachers at Lafayette High School with Morgan Trevathan and Virge Cornelius. The article that details some of that work is finally published in the current issue of Mathematics Teaching in the Middle School. Check it out!
Amidon, J., & Trevathan, M. (2015). Supporting progressive mathematics instruction through community. Mathematics Teaching in the Middle School 21(5), 288-294.