This paper focuses on the teacher competency testing movement that is sweeping the nation. The first section provides an overview of teacher testing programs nationally, including the rationale for such programs, the types of tests used across the states, concerns about current testing programs, test validity studies, and fiscal and legal issues. The second section presents state-by-state data pertaining to teacher testing programs currently being implemented or considered, including testing requirements for admission into teacher education programs, for initial certification, and for practicing educators. Contact persons are listed. A 70-item list of references concludes the document. (CB)