It has to be separate from any other evaluation for advancement or compensation.

FORBES: Treating The Dysfunctional CEO

The foundation and others have estimated that it could cost between 1.5% and 2% of the overall budget for teacher compensation and benefits to implement a feedback and evaluation system based on multiple measures of teaching performance.

CNN: Bill Gates: Invest in better teaching

It wasn't -- it's not just about ensuring that there is -- that any compensation should be more directly tied to long-term equity versus short-term cash, but you have to make a strong evaluation about the sheer level and size of your compensation in the environment in which we exist.

WHITEHOUSE: Press Briefing