1. So you oppose video cameras on police?I don't know what you do for a living but having a camera on you watching every move you make with people who are not trained in your area having a say on how you do your job doesn't sound like an optimum approach. It makes it more like a police state.
If that's the goal, then definitely go for it. Seems to me we have actual pressing issues to spend money on in schools. I already pay for your kids schooling (I don't have kids and my wife and I never will at this point) so maybe I refuse to have MY TAX money wasted on that. If you want that YOU pay for it. Not me.
2. Your "more pressing issues" argument is an invalid logical fallacy.
3. Are (or were you) a teacher/educator? If so, you personally receive more benefits than you pay in taxes.
4. You would still be against cameras in the classroom even if you didn't pay for it, so why bring up this red herring?
5. I am starting to understand why you don't want "people who are not trained in your area" (i.e., parents) to see what you are doing. This is particularly ironic in that you are not trained in their area, either. But, of course, you know better...