The most noxious element of President Obama’s Race to the Top is the requirement that teachers should be evaluated to a significant degree by the test scores of their students.

By now, there is a large body of research that shows that this is a very bad idea, that the rankings based on test scores say more about who was in the class than the quality of the teacher.

But the idea of evaluation by test scores has been taken up with delight by the farthest right-wing state legislatures, the latest being Michigan.

Michigan has one of those legislative bodies that devotes considerable time to figuring out what they can take away from public schools and public school teachers.

And so now there is a bill to tie teacher compensation directly to test scores.

We know how this will end:

Teachers will teach to the test.

Schools will narrow the curriculum only to what is tested.

Some desperate teachers and/or administrators will cheat.

Some schools and superintendents will find ways to game the system.

Teachers will avoid the students who might drag down their rankings.

Some fine teachers will be fired because they taught the most challenging students.

Teachers will be demoralized by the abasement of their profession.

The only one who will look on these events with pleasure will be the architects of Race to the Top.

This is what they wanted.

And if they didn’t want it, they should stop it now. Admit their error.

How sad.