I was at a meeting with two 8th-grade language arts teachers co-planning a unit on Macbeth. Both Stephen St. Germain and Rafe Park were expert teachers, and the creative sparks were flying. “There’s a microcredential for questioning,” I said. “Would you like to try it out?” The pair didn’t hesitate. I decided to open a few more doors.“How about a lesson study on the same lesson and a Greenlight Learning Walk so other teachers can come into your classroom and see what you’re doing?” They hesitated for a moment. I held my breath. After exchanging glances, they said, “Sure!” A bubble of excitement burst in my chest. “This is working,” I thought. “Inside-Out PD is working just as we hoped.” THE WHY As a professional