DougTheC Same thing you would do with adults: make Corruptors, drop them in a place students frequent, enjoy the results whenever a new day begins. And the RNG factor of who picks it up is negated by the fact that you are fine with any student AND need to raise Corruption only a bit.
Another thing I would advise is to knock Religion off the curriculum. I have one lesson a day for each class, and Corruption is stuck between 11 and 12 despite +Corruption club [and random school] events. Planned in my case, by the way: I wanted to see how far I can push Inhibition without Corruption. Turns out, down to ~40 was a cakewalk. Either way,
Inhibition and Corruption go hand in hand.
One more trick: once you hit max Reputation, it is but another resource to tap into. For example, during one of my no-hypnosis [female principal] playthroughs sex with Stacy during the PTA meetings resulted in a hit to Rep + increase in Corruption for all PTA members. That eventually pushed Sandra and June far enough to allow me to pass the gated policies.
Corruption is a "slow crawl" in the beginning, yes, but once the ball starts rolling...