School officials across the nation keep warning that the new tests are “harder,” and passing rates will drop by 30% or more.

Why?

The passing mark–or cut score–on tests is not determined by science. It is a judgment call.

Those who are in charge decide where to place the passing mark.

If the scores go down on a test that is new, it is because the officials set the passing mark with foreknowledge that scores and passing rates would fall.

In addition, the state education department piloted the questions, and they know with a high level of precision which are hard and which are easy.

If the scores fall, they were designed to fall.

This is what they want.

Why? I don’t know. Ask them.