This document discusses the meaning and importance of principles of teaching. It defines principles as fundamental truths or guiding norms that govern processes like education. Principles of teaching are derived from expert opinions, comparative studies of teachers, and educational experiments. They serve as the basis for intelligent educational practice and guide, stimulate, and interpret school practices. Principles are classified into starting, guiding, and ending types. Starting principles involve student characteristics and development. Guiding principles refer to instructional methods and techniques. Ending principles relate to educational goals, objectives, and outcomes. The document maintains that understanding principles of teaching can help educators better meet the needs of individual students.