This document compares and contrasts second language acquisition theory and second language pedagogy. It discusses Stephen Krashen's Monitor Model theory, which posits that language is acquired through meaningful interaction rather than formal instruction. Language acquisition is a subconscious process, whereas learning is a conscious process. It also notes differences in how children and adults acquire a second language. Overall, it finds that while acquisition happens naturally, learning requires formal instruction and benefits from teaching methods, but acquisition allows for near-native fluency.