When professional learning is interdependent, a teacher's individual success hinges on the efforts of the entire team. Leadership experts Jenni Donohoo and Ann Mausbach explain why that's a good thing.

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…