This booklet offers a brief history of teacher lore, examines its theoretical bases, and summarizes its professional value, discussing how preservice teachers, inservice teachers, and others can use teacher lore for professional development. Teacher lore, or teacher narrative, includes fiction and nonfiction, oral storytelling, print, film, television, and online exchanges. Interacting with teacher lore offers such benefits as creating a professional community, challenging teachers to become reflective practitioners and change agents, and offering a better picture of schools and what they might become. Using teacher lore with preservice teachers can involve autobiography, others' stories, personal reflections on practice, and cases. Textbooks for preservice teachers are beginning to reflect the importance of teacher lore. Using teacher lore with inservice teachers can be accomplished through teacher research, graduate coursework, other professional development possibilities, and teacher evaluation. Using teacher lore with other stakeholders can help improve the decisions of educational policymakers and the understanding by the general public of what is going on in schools. (Contains 42 resources and 51 references.) (SM)