I don't understand the research that says that class size does NOT make a difference. How is that possible? If there are 30+ kids in a class no way is the teacher going to have a chance to get around to everyone who needs one-on-one attention.

The district is using this research as an excuse to raise class sizes. Meanwhile the teachers are saying that it may be better to not accelerate DS and put him into a zoo like that. So obviously the teachers think small class sizes help. Why doesn't the research show it?