we're out of step with a country like finland, we're out oftep with actuay the high-perrmin nations o the worl the ing i if u want teach terms improve, you have a private conversation. you say look at the scores in your class. where can you improve? want also, these scores were so inaccurate. all of these methods-- it's called value-add assessment-- all the experts say it's not ready for prime time. they're inaccurate. they were unstable. a teacher who teaches the same subject in sixth grade and seventh grade, she's effective in sixth grade and ineffective in seventh grade? that makes no sense. >> rose: here is what i hear you saying. it's perfectly appropriate to fire teaches for they're not doing a good job, right? uh-huh. >> rose: you believe that? >> uh-huh. >> rose: not tenure, and the teachers union should not be able to protect them if they're doing a bad job. >> absolutely. >> rose: what's the metric for judging? >> i think it should be a professional basis of judgment. teachers-- we say that teaching is a profession. teaching should be judged as a profession, by professionals