They say that if you have a hammer, everything looks like a nail.

When you have made billions of dollars by selling technology, you start thinking that you hold the answer to all the world’s problems.

Bill Gates thinks he has the answer to education: standardized testing, data, and measurement, with lots of technology.

Does he know that every child is different?

Does he know that standardized tests are subject to random error, human error, measurement error, and other errors?

Do his own children take standardized tests?

Please, Bill, teach in an urban school for one week. Just one week. Let us know how it goes.

Take the standardized tests that you value so much. Not the fourth grade tests, but the twelfth grade tests. Publish your scores. Please.