What's It Gonna Take?

While I do understand a lot of concepts, I don't understand why the 12th grade girls I teach can't shut up. Granted, physiology is not the most exciting subject to some people, but, heck, it's got its merits.

Those merits include understanding your body and how it works. If they taught that to me in high school, I don't remember. But I certainly didn't talk OUT LOUD while my teacher was talking. What's it gonna take to shut them up?

Any thoughts or suggestions, please write.