If you are talking about really interesting things in your class there will be times when the conversation bubbles over and students spontaneously start chatting with each other. Here is one technique that I caught on footage from a recent workshop that not only gets you to regain control of your class in 20 seconds, but it also maintains a pleasurable atmosphere in class without yelling or unpleasant reminders about rules. I call the technique “harnessing a running horse”:
If you want more, I still have a few workshops scheduled for Autumn 2018.