Hello, I have a few Y9 and Y8 sets, all of which are full of great kids. However I am facing challenges in relation to pupils calling out repeatedly when questions are asked an during class discussions. I have tried tactics such as asking for no hands up and picking individually on students after think, pair, share activities, as well as things such as "hands up f you can tell me..." and individual praise. However a number of pupils, generally the pupils who want to contribute the most, still call out. I am finding it difficult to remedy this, despite the behaviour I expect having been modeled on a number of occasions. I also find that in these sets some pupils take time to fall quiet at various time in the lessons and it takes time for silence to be achieved.I will repeatedly have to pause due to pupils talking over others or pupils attempting to talk shortly after having settled into silence during a class discussion. Are there any tips that people have?