I would talk to the parent and try to get them more involved in the whole school rather than just your classroom. I would ask if the mother would like to volunteer in another classroom, one that the teacher has problems getting volunteers. If that for some reason does not get the parent out of the classroom I would then have a conversation with the mother about coming in less and talk about the distraction it is causing with their child.

I would talk to the parent about how the students work has started to go downhill. I would tell her that I appreciate her helping in my classroom but I can see it is having an effect on the student. I would recommend that she maybe volunteer in another classroom, office, or the lunchroom. That way we get to keep out volunteer and help our students get back on the right track.

If talking to the parent doesn't work, I would talk to the principal to create volunteer guidelines like we have in our school. At the beginning of the year, you fill out a form saying what activities you would like a volunteer for. You have the option of checking off that you would not like volunteers to be parents of your students. I check this option each year. It's an all or none type of deal, so if you check it, NONE of the parents of your students will be volunteering in your room. Of course we still have the open door policy where parents are welcome to pop in their children, but if the volunteer aspect is taken away from it, it takes away her excuse to stay in there for long periods of time.

I would give her things to do that would be outside of the classroom. In my school, we have a parent volunteer room. This is where parents go to do any volunteer work. We have an open door policy to volunteer, just not in the actual classroom. Too big of a distraction.

Tell the parent to go and volunteer in the library, cafeteria, one of the specials. Her daughter's grades should not be effected due to her constantly being in the class.