School choice advocates now stand on shaky ground. Their own funded evaluations show that students in voucher schools do not get higher test scores than their peers in public schools.

So they fall back to the next line of defense, which is to say that the voucher students have a higher graduation rate.

In the case of Milwaukee, the graduation rate is muddied by a very high attrition rate, either 75% or 56%, depending on which version of the evaluation you read. Both are very high attrition rates, not much of a statement of student satisfaction.

But there are other problems, as you will see if you read Dr. Mercedes Schneider’s review of Dr. Patrick’s Milwaukee study.