My 5 year old just got 7 vaccines in June. I'm not sure I could name every one without pulling out her yellow card listing them, and it would probably take me half an hour to find the card 
So I'm one of the most educated moms I know on the topic, and even I'm "unaware" Though I know she got "a" meningitis vaccination, there are two different ones out there and I don't honestly remember which one she got.
Back to my hatred of insurance companies -- if the ENTs could give vaccinations related to their patients and know they/the families weren't going to get hassles from the insurance companies paying for it, that might solve the problem. But in the US, this is unfortunately not the case. Vaccinations are not considered part of regular ENT practice, and thus PCPs/Pediatricians have to give the shots. We went through this with the Prevnar shot several years ago (which reduces ear infections) our clinic WANTED to give it to all of our ear tube patients, but the families weren't getting reimbursed for it if they got it at our clinic, where if they got the shot from their regular pediatrician, they WERE getting reimbursed.
I doubt a poll of your students will be very meaningful. Unless they were implanted as adults and have a long memory, who knows if they will remember which shots they got when or what they were for. The only thing that would generate valid results is to have them bring in their vaccination cards.
