Earlier quoted context omitted.
"I didn't get into college because I had to use the bathroom during class a lot" - no one, ever Just turn on your voice recorder and go.
I don't know about how things usually are because my kids aren't in HS yet, but I do know that their school district, during distance learning, has a blanket policy that parents are not allowed to record the teaching sessions. So I wouldn't be too surprised if voice recorders aren't allowed in many schools as well.
I can't imagine any good reason for that policy other than covering for terrible people.