I believe the former student is the only one who can access their record.
If that is true, then even if they do exist, seems rather pointless. I don't really care what some former teacher might have said about me or some opinion they had. In h.s. or even college, I can recall a few teachers who formed their opinion about students based on whether or not they thought/acted like thought you should. Your grade depended on having the same opinions they did which seemed like nonsense to me. Fortunately, most teachers didn't behave that way.
A future employer usually checks on someone's resume to verify they actually attended/graduated from that school. Sounds like they wouldn't have access to those other records.