In this episode, Mark talks with Deanna Cullen, about her work as a teacher, how she came to modeling, and how it changed her teaching. They talk about the work she is doing now with the Journal of Chemical Education and with ChemEdX, the Chemical Education Exchange. They also talk about Target Inquiry, a 2 1/2 year long professional development program which gives teachers the opportunity to do research and develop labs to build inquiry skills. They talk about summer conferences for chemistry teachers and the benefit of that kind of professional development.