This document discusses the meaning and types of principles in education. It defines principles as fundamental laws or doctrines that guide education. There are three main types of principles: starting principles which involve student characteristics, guiding principles which are instructional methods and techniques, and ending principles which are the goals and outcomes of education. The document then lists several specific principles of effective instruction, such as beginning with clear objectives, involving multiple senses, and creating a supportive learning environment. Overall, the principles outlined are meant to provide guidance for effective and productive teaching and learning.