Diantha Lay is principal of an elementary school in Montgomery County, Maryland. When she wrote this chapter, she was just starting a new position for the county as a staff development teacher. Earlier she had been a second- and a fourth-grade teacher with a passion for science. When her county decided to establish the new position of staff development teacher in every school, Diantha embarked on a new adventure. In this chapter, she describes the formation of teacher study groups as she began to engage colleagues in developing a professional learning community in their school.