Category: Second Language Acquisition

The natural order hypothesis explained: why learners acquire grammatical structures in a predictable sequence regardless of teaching order, and what it means for instruction.

The monitor hypothesis explained: Krashen's account of how learned grammar rules edit acquired speech, the three conditions it requires, and why over-monitoring blocks fluency.

The silent period explained: what it is, how long it lasts, why it is normal, and how to tell it apart from a student who simply has no chance to speak.

Language acquisition vs language learning: Krashen's distinction between subconscious acquisition and conscious learning, and why it matters for teaching.

BICS and CALP explained: Cummins's distinction between conversational and academic language, why it takes 5-7 years, and what it means for districts.

The Interaction Hypothesis explained: Long's claim that negotiating meaning in conversation drives language acquisition, and why it matters for speaking.

The Output Hypothesis explained: Swain's claim that producing language drives acquisition, the three functions of output, and why speaking matters.

The affective filter explained: how anxiety, motivation, and confidence affect language acquisition, and how teachers lower it for English Learners.

The Input Hypothesis explained: Krashen's claim that we acquire language through comprehensible input at i+1, and what it means for teaching.

The stages of second language acquisition: preproduction, early production, speech emergence, intermediate fluency, and advanced fluency, with teaching tips.