Classroom behavior

There is lots of chatter during several of my classes, especially when the professor is lecturing. I want to know if this is normal for medical school? It gets to the point that I can no longer understand what the professor is saying. Every time the students are told to keep it down, it only lasts for so long before they are talking during lecture again. It just seems disrespectful.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums