This chapter proposes one way to foster teamwork and develop a professional learning community at the secondary level by describing the development of a leadership team focused on improving science teaching and learning. Forming a leadership team is just the first step. We often expect a team of adults to know how to work together; however, we find that this is a false assumption. This chapter will provide ideas and insights into how to build a team as part of the task of improving science teaching and learning, as well as how to help the team and the entire school community develop the skills and abilities to work together as a true professional learning community.