According to Brown (2001, p.54), “it is appropriate [...] to focus on what we do know, what we have learned, and what we can say with some certainty about second language acquisition. We can then clearly see that a great many of a teacher’s choices are grounded in established principles of language learning and teaching. By perceiving and internalizing connections between practice (choices we make in the classroom) and theory (principles derived from research), our teaching is likely to be enlightened”.

The author divided twelve principles into three categories: cognitive, affective and linguistic.

Choose the alternative in which ALL the principles correspond to the given category