Music instigated great dialogues about cultural differences!
Obviously there are aspects of language in the real world that require more than just acquisition. Krashen’s Monitor hypothesis addresses this quite neatly. It talks about a watcher that functions in language use, helping to keep everything neat and tidy. Just as a hall monitor watches students in the corridors of learning, and a TV monitor allows us to keep an eye on what’s happening in another place, the Monitor keeps tabs on language coming out.
Of the four hypotheses for which Krashen is best known, probably the most important for the language teacher is the Acquisition Hypothesis.
I have done a variety of types of games in my class to get students to maintain speaking in Spanish and, equally as important, to stay on topic. Both are a huge challenge.