This document discusses the need for psychological knowledge and classroom interaction techniques for teachers. It begins by defining psychology and outlining the historical understanding of psychology. It then discusses how psychological knowledge can help teachers understand learners, the learning process, evaluation, and how to teach effectively. The document also covers understanding individual differences in students, promoting positive mental health, motivation strategies, leadership styles, and Flanders' Interaction Analysis technique for observing classroom interactions. Flanders' technique involves coding verbal interactions between teachers and students into 10 categories to analyze classroom dynamics.