In this episode, Mark talks with Kelli Warble, long-time modeler and now works at Arizona State University primarily in physics education. They talk about her early exposure to modeling instruction, the new units for modeling in the middle school math classroom that they're working on, including this summer's bite-size workshops in middle school math. They also talk about several of Kelli's top tips for teaching in the modeling classroom - most of which would be excellent tips for any classroom.