Lately, I have heard teachers and school leaders express a common frustration: "We are _______ years into a _______ initiative, and nothing seems to have changed." Despite redesigning learning spaces, adding technology, or even flipping instruction, they still struggle to innovate or positively change the classroom experience. Imagine innovation as a three-legged stool. Many schools have changed the environment leg, but not the other two legs: the behaviors and beliefs of the teachers, administrators, and students.