Call Me a Cynic,

but the only reason principals are complaining about RTTT is because THEY would have to be held accountable:

NYS Teacher Evaluation Controversy from Rockville Centre Schools on Vimeo.

When it was only teachers who were subject to reforms, principals were just fine with them because then they could abuse their power even more than they already do, but when THEY were subject to actually being fired, they decided to raise a stink.

Can't have that. Principals are simply benevolent or malevolent dictators of their schools depending on their mood or temperament. How dare anybody challenge their sovereignty?