How Do You Get a Six Year Old Girl to Keep Her Mouth Closed in School?

Have you asked your daughter why? I know you said you have talked to her about how important education is that you want her to be able to learn, but have you asked her why she behaves this way? This actually many times is an indication of boredom. I was also the same way in school and spent alot of time in corners and closets. It was usually because I was quick to finish my work and had nothing else constructive to do. This may be an issue that needs to be discussed with the school and/or teacher.

I do agree though that positive reinforcement, rewarding her for her good behavior, is the more effective way to go even though it is hard to resist punishment. When you take away priviledges as discipline just do so very matter of factly, be done with that episode, and move on. ie: you have done "this" so you will lose "this" (end of story)

You could try a reward system....each good report from teacher =something she really likes. She may just not be interested yet in what the teacher has to say. If funds are available you might look into a Montessori program where she could learn in her own way. It sounds very frustrating, but I'm sure it will work out...I'm a personal case in point.
Oh, yes, I remember the days. I spent most of first grade in the corner - for talking. Of course then there was freshman year French...the only thing I remember is "ferme la busche" (Spelling???), which means "shut your mouth". I'm sure my mom went through all the same angst you are now experiencing but I'm here to tell you all is not lost. I have a Master's Degree in Social Work, which I got with honors, talking in class all the way. Good luck!

I had the same problem with my daughter, who is now a college graduate! My daughter even told the teacher, once in the middle of conversation, just a minute and finished conversing!!! grrrrrrrrr! Some things that worked for us were more along the positive reimbursement side. We did a sticker chart, for GOOD BEHAVIOR, not talking or not getting into trouble. She was then more focused on behaving and being quiet. Then if a week got filled up with stickers(which she would get to place the sticker of her choice on the calendar herself) she would get a small reward, ie: ice cream, coloring book, something she liked! You can also ask her about what she learned when the teacher or others were talking and reward that. Since she is well-behaved already she maybe trying to get attention by talking too much. Good luck!