The document describes various language teaching methods including Grammar Translation (GT), Direct Method (DM), and Audio-Lingual Method (ALM). GT was one of the earliest methods and focused on translating between the first and second languages. DM arose in response to GT and emphasized using the second language in the classroom without translation. ALM was influenced by behaviorism psychology and structural linguistics, treating language learning as habit formation through repetition and reinforcement. It aimed to avoid interference from the first language.