Oh yeah, obviously, how this works is that at the monthly censorship and child ignorance meeting (oops, I mean, at the monthly all teachers meeting), you give the new proxy password to the teachers. Alternatively, you could give a different password to all of the teachers and log the internet access that goes along with their authentication. You carefully explain to the teachers that all internet access that happens after they authenticate with the proxy is logged, so if they give out their password to the kids so the kids can use the internet when they aren't around and the kids go find something "they shouldn't", it will be discovered and it will be known which teacher didn't do their job. If you're going to have teachers spying on the kids, then I think you should at least make it clear that the administration is spying on their spying.

Jim