Whether a teacher loves it or dreads it, lesson planning is a crucial step in the teaching process. Done effectively, collaborative lesson planning--in which teachers work together to design lessons--leads to increased professional learning, higher job satisfaction for teachers, and better lesson plans. The process poses challenges for both teachers and administrators, with a lack of time and teacher resistance to collaboration being two major barriers. Bauml suggests ways school leaders can address these barriers and create conditions for successful collaborative lesson planning at their school.