I don't know if you'll know this, but are they implementing any other safeguards on the Macbook Airs? (MbA) Just from doing tons of work in a Mac-centric university where the students' idea of pirating was to search "[item] download mac", the search results are crawling with predator sites that promise anything from PDFs to interactive solutions manuals, only to actually download a dmg full of malware (usually Mackeeper and a few others). And of course students (and professors alike) would dutifully punch in their admin pass without thinking about it, and quick enough there'd be a nice and infected machine.
What I'm getting at is if I were the tech admin for that school, I'd be less concerned about what 0-days exist in flash or java and more concerned about what people are willingly installing on their computer, and though this is obviously anecdotal, seeing what my younger cousin would end up installing despite our warnings, I'm inclined to think kids aren't up to the task just yet of full on computer management. Even fairly savvy kids would fall the the sales pitch of the one kid who found a free download for a popular game, which of course was packed with malware.