Colorado is changing the rules for how teachers earn and keep the sweeping job protections known as tenure, long considered a political sacred cow around the country.
Many education reform advocates consider tenure to be one of the biggest obstacles to improving America's schools because it makes removing mediocre or even incompetent teachers difficult. Teacher unions, meanwhile, have steadfastly defended tenure for decades.
Colorado's legislature changed tenure rules despite opposition from the state's largest teacher's union, a longtime ally of majority Democrats. Gov. Bill Ritter, also a Democrat, signed the bill into law last month.
After the bill survived a filibuster attempt and passed a key House vote, Democratic Rep. Nancy Todd, a 25-year teacher who opposed the measure, broke into tears.
"I don't question your motives," an emotional Todd said to the bill's proponents. "But I do want you to hear my heart because my heart is speaking for over 40,000 teachers in the state of Colorado who have been given the message that it is all up to them."
While other states have tried to modify tenure, Colorado's law was the boldest education reform in recent memory, according to Kate Walsh, the president of the Washington-based National Council on Teacher Quality, which promotes changing the way teachers are recruited and retained, including holding tenured teachers accountable with annual reviews.