Beg to disagree. That’s a beast of a hearing loss you have and classrooms are horrific listening situations.
Reverse slopes can be tricky; there’s more individual variation in this population as to what will work compared to a more traditional sloping loss. You’ll want to find a patient, experienced fitter and you may also need to be patient. But I would hesitate to recommend to any patient that they keep a set of hearing aids that are not benefitting them.
On the classroom side, are there things you can implement to improve noise and acoustics? With infection control policies, it’s difficult to add a lot of soft surfaces, but can you add more cork-boards, hush-ups to chair legs, close doors and windows, have machinery serviced. Can you arrange the students in the classroom into a formation that is more beneficial, getting them closer to moving the soft-spoken ones up? We always do FM systems from teacher to student, but students to teacher is much harder–you’d be looking at either training the kids to talk into pass-around microphones, or seating them in groups and networking a bunch of table microphones in each group that the kids would not be allowed to touch.