i always get mouth sore! :(

Your mouth should not get sore from talking! Do you eat regular meals? Do you eat fruit and vegetables at least once a day? Do you get a good sleep, so that you come to class well rested? Do you snack on fast foods?Deep fat fried foods, and sugar donuts could cause mouth sores. Your body is telling you, and you need to listen. Listen to your body and stay well!

You mean you're getting a sore mouth from talking too much? Wow. :) Well, you could try a lubricant from a local apothecary. It can keep your mouth's area hydrated. I'm honestly not even sure if that would help, but it'd be a start atleast. :) Good luck!