[paulryanrogers]

Teaching the test narrows the subject matter significantly. Some of the most important things I learned in school weren't directly on tests: critical thinking, fallacies, cultural studies, how to avoid being exploited.

That said, in some circumstances only teaching the test could be an improvement.

[readthenotes1]

I was in a meeting once where an outside advisor asked the test group to share the test cases with the developers.

"But if we do that," the test manager complained, "the code will only work for the tests."

"Well, wouldn't that be a nice change." observed the Director.