theory of L2 acquisition

Http://www.sk.com.br/sk-krash-english.html

The above links about Krashen’s well accepted theories of second language acquition.

Krashen's theory of second language acquisition consists of five main hypotheses:

• the Acquisition-Learning hypothesis;
• the Monitor hypothesis;
• the Natural Order hypothesis;
• the Input hypothesis;
• and the Affective Filter hypothesis.

The Acquisition-Learning is