I have three students that sit at the back of the room and talk in a whisper through a majority of the class. They all get A's and B's so I have not tried to control it much. Another student came to me yesterday and says that the constant whispering has caused her to lose focus many times. How do I appropriately tell the students who are talking to keep it down or better yet knock it off without embarrassing them in front of the class. I have tried the subtle approach of "come on guys lets pay attention" which works for a minute or two. Yesterday I said to everyone that the talking was causing other students to lose focus but that just caused a riff amongst the class. I am not sure at this point how to handle this. From the course so far I think I am mix between the buddy and the controller.