... most high schools and jr. highs have more than one science teacher.
Do you honestly think you could find science teachers who would be willing to teach something they know to be false just in order to keep their paycheck?!
It's hard enough now to find competent science teachers. This would make it impossible.
IMO, if you want to teach CS/ID, it has to be either like KU, in comparative religion/folklore/myth class, or in rhetoric class, where its illogical and emotion-filled "arguments" could be exposed for what they're worth, and compared to politicians' promises, advertisements, quack medical appeals, etc.
All a competent science teacher could do is explain how CS and ID don't satisfy the minimal requirements for theories, and are thus pseudoscience, similar to UFOlogy, asrology, etc.