Five Hypothesis on Language Acquisition (Stephen Krashen)

1. Acquisition Learning: obtaining language passively and informal. Becoming aware of the rules

2. Monitor: edits the output by acquired system. Rules are learned to polish oral or written 2nd language. Should be learned freely

3. Natural Order: Acquire grammatical structure in sequence (subject, verb, object)

4. Input: Comprehensive input, messages must be coded to be fully understood

5. Affective Filter: Safe environment for learners. Motivation, self esteem and anxiety free