In college, I thought I was pretty good at classroom management! But I have a classroom of talkers. It just seems like no matter how many times I say, thank you for raising your hand, or I only call on people who raise their hand, it doesn't phase them. And when we come into the room from somewhere I'll say, "Please go to your seat quietly and stay quiet" they talk even louder! I am firm, but I get so close to having to yell to get them quiet and my throat is already soar from having to talk "loudly"! What can I do?? Help! I use several rewards, but some just don't care!