Let students talk about talk. What this means is that after a discussion or dialog, spend some time talking about the talking. For example, if you have had a dialog on a subject in class (justice, negative numbers, DNA, 19th century poetry, etc.), do some talking about the dialog itself (not about the subject, but about how the talking went).
Questions to ask: How was it to talk together? Did we follow the rules of conduct? Did we come up with different ideas? Did we challenge and investigate ideas? Did we learn something? Is there anything we would like to do differently the next time?
It is important for students social and mental well-being, as well as their learning and their cognitive development, to get opportunities to have regular high quality dialogs in school. In order to increase quality in dialogs in education, both students and teachers need some practice and skills. One skill needed.
See Reznitskaya & Wilkinson (2017). The Most Reasonable Answer. Harvard University Press for more information.