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RAY SUAREZ (Newshour): The debate over testing in schools, and whether students' scores adequately reflect a teacher's performance, has been raging for well over a decade. Now a new study has tracked more than two-and-a-half million students over two decades.
It found test scores are indeed a good gauge for evaluating student performance. And the study found replacing a bad teacher with an average or a good one can translate into a huge economic difference. Combined, the students could earn hundreds of thousands of dollars more over their working lifetimes.
We look at the study and the response it's stirred with Harvard economist Raj Chetty, one of its three authors. And we hope to be joined by Randi Weingarten, president of the American Federation of Teachers, the second largest teachers union.
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