Valuing physics over P.E., Colorado schools test novel pay scale

As a math teacher, I was always (selfishly) interested in teacher pay scales that valued hard-to-fill positions more. I think the current model for paying teachers, one based on experience and credits earned, is unfair. (I've touched on this before at The thing is, I'm not sure most merit pay models are any more fair, and I'd rather work in a system with an unfair system that teachers agree with than an unfair system they hate. Douglas County, Colorado, will be experimenting with a market-based approach to paying teachers, and some teachers don't sound happy about it.