“Research on comprehension-based approaches to second language acquisition shows that learners can make considerable progress if they have sustained exposure to language they understand. The evidence also suggests, however, that comprehension-based activities may best be seen as an excellent way to begin learning and as a supplement to other kinds of learning for more advanced learners. Comprehension of meaningful language is the foundation of language acquisition. Active listening and reading for meaning are valuable components of classroom teachers’ pedagogical practices. Nevertheless, considerable research and experience challenge the hypothesis that comprehensible input is enough. VanPatten’s research showed that forcing students to rely on specific linguistic features in order to interpret meaning increased the chances that they would be able to use these features in their own second language production. Another response to comprehension-based approaches is Merrill Swain’s (1985) comprehensible output hypothesis. She argues that it is when students have to produce language that they begin to see the limitations of their interlanguage (see Chapter 4). However, as we will see in the discussion of the ‘Let’s talk’ proposal, if learners are in situations where their teachers and classmates understand them without difficulty, they may need additional help in overcoming those limitations.”