not sure what that is you've posted, but it doesn't look to be the Bill to me so I went to find a copy:
http://www.leg.state.co.us/clics/clics2010a/csl.nsf/fsbillcont3/EF2EBB67D47342CF872576A80027B078?open&file=191_rer.pdfooo- found this, too. Scanned it, looks interesting:
". . .Into this mix came Sen. Mike Johnston, D-Denver, a former public school teacher and principal. Two weeks ago, Sen. Johnston introduced Senate Bill 10-191, which would strengthen teacher and principal evaluations and tie 50 percent of those evaluations to student growth. . . . As a former middle school teacher, I am mindful that there is no "silver bullet" for public education. I know how difficult it can be to teach at-risk students. It would be arbitrary to hold a teacher accountable for all the external factors that inhibit student learning.
But by the same token, it would be equally unfair to students if their learning were wholly irrelevant to their teacher's evaluation. Evaluations are supposed to measure effectiveness: Is it really unreasonable to say that part of a teacher's effectiveness is her ability to produce academic growth?
I know what struggling students are capable of when they are given the chance to succeed. Admittedly, when teaching is done right, it is exhausting work. But people become teachers because they relish this challenge. And more good teachers will remain in the classroom when they are recognized for their hard work and when receiving non-probationary status is an accomplishment rather than a given. . ."
http://coloradosenate.org/home/inthenews/teacher-effectiveness-bill-a-common-sense-solutiondon't have a chance to read the bill myself, right now. Off to take pic of son's first PROM - Tux and girlfriend and all.... :)