This document summarizes several theories of language learning, including: - Edward Anthony's definitions of approach, method, and technique in language teaching. - Humanist theory which focuses on human dignity and observational learning. - Behaviorist theory which emphasizes reinforcement and punishment in language acquisition. - Chomsky's theory of Universal Grammar which posits an innate language acquisition device. - Cognitive theories which see language learning as involving mental schemata and organization. - Krashen's Monitor Theory distinguishing between acquisition and learning.