The document discusses the evolving roles of teachers from traditional models to newer models. It describes teachers' roles as instructional experts who motivate and engage students, managers who organize their classrooms and curriculum, and counselors who provide academic and personal guidance to students. It also presents teachers as practitioner-researchers who study their own teaching practices and evaluate methods for improving student learning and outcomes. Overall, the document outlines how teachers' responsibilities have expanded to support students' learning and development in a changing global environment.