The document provides information on the concepts of teaching, effective teaching, and the roles of teachers. It defines teaching as an interactive process between teacher and students aimed at changing student behavior. Effective teaching is achieving teaching objectives and involves effectively managing classrooms, clear objectives, engaging questioning, lesson consolidation, and diagnosing/correcting errors. An effective teacher is a subject matter expert, pedagogical expert, excellent communicator, student-centered mentor, and systematic assessor who facilitates learning through knowledge sharing, classroom activities, assessment, and feedback.