When you are in the classroom at our school as a volunteer or otherwise, you have to sign a confidentiality agreement. We are not allowed to share our observations about other students outside of the class. Maybe you could offer to sign something similar to allay their privacy concerns?
For public school we have access without signing anything. For the private gifted pull out program we are not allowed access. The child can't even visit before attending. This is because it disrupts the flow of the class.
