My son in school

What is the name of your state? Nevada

My son is 7 years old an he got in trouble twice in school once in 1st grade and again today. He was asked to sign a paper regarding what happened each time without a parent there to look over what he was about to sign. My question is.. Is this legal for a minor to sign paperwork he can not read and without a parent present?

Thanks
Laura

Unless they're going to use this paper in some criminal prosecution, there's not any particular need for parental or other legal supervision as to his statement.

How do you know that the paperwork was not read to him?