This document discusses key concepts in second language acquisition, including:
- The difference between first and second language acquisition, with second language acquisition referring to learning additional languages beyond one's native tongue.
- Factors that can help or hinder second language learning such as interaction level, age, and affective barriers like embarrassment.
- Educational approaches to teaching second languages including grammar-translation, audio-lingual, and communicative methods.
- Concepts like interlanguage, fossilization, input/output, and motivation that influence the second language learning process.