== Writing ====References====External links==* Books and articles by Stephen D Krashen*Response to criticism by Ron Unz* NPR Talk of the Nation episode featuring Stephen Krashen* Krashen's Comprehension Hypothesis Model of L2 learning Applied linguist Vivian Cook's page on Krashen's hypotheses.
* Books and articles by Stephen D Krashen* Response to criticism by Ron Unz* NPR Talk of the Nation episode featuring Stephen Krashen* Krashen’s Comprehension Hypothesis Model of L2 learning Applied linguist Vivian Cook’s page on Krashen’s hypotheses.