Geeeeez this is why we don't like parents in the classroom. sorry don't mean to hijack but this really bugs me. Teacher should be doing grading the math quizzes. Teacher should be seeing the errors. A parent should not know.
+10000
former teacher turned SAHM. I never had parents grade papers in my class-in fact, we had a policy in my school that, while we encouraged parent volunteers, they were not volunteering in their own child's class (except for room moms, parties, and field trips). Great policy.
As a parent volunteer, I was grading papers--to include writing essays, etc. The teacher had lots of volunteers and everybody knew everybody's business. Awful policy. Parents should not have access to this information. There was one parent who was accused by another of changing test scores in the teacher's grade book. Sad part--I think it was true.