This is a terrific article about whether test scores lose their value for accountability when so many students opt out.

What’s terrific about it is the comments of opt out leader Jeanette Deutermann, who says the purpose of test refusal is to bring down the system, to make test-based accountability impossible. She is a parent and she knows how testing has undermined education.

Then there is Tom Kane, the Harvard economist, insisting that without the scores, poor kids and minorities will be neglected. Where is the evidence that 13 years of testing has closed gaps or helped the neediest children?