I end school Summer Vacation early - Skool Daze ReSkooled

I'm playing the Steam version of the classic child hood sim. Can I get Eric out of trouble with his mum by taking advantage of the staff's exposed plan to use hypnosis on themselves to forget the office safe combination, and then swipe his report card so he can change it? Or will he be expelled for all the mischief he made and blame coming from others? We will see....