This document summarizes and compares several different approaches to language teaching, including grammar-translation, audio-lingualism, cognitive-code teaching, and versions of the direct method. It also discusses newer approaches like Asher's Total Physical Response Method, Terrell's Natural Approach and Lozanov's Suggestopedia. For each approach, it outlines the key features and evaluates them based on how well they satisfy the requirements for optimal language input and whether they emphasize learning over acquisition. Overall, newer approaches that prioritize comprehensible input are shown to produce better results than older methods that fail to meet input requirements or overemphasize conscious learning.