William Mathis on the Illusory Graduation Rate of Students in D.C. Voucher Schools

“They prohibited further studies of the program and called for greater federal support of voucher programs.”

So they don’t like the results of studies because the facts prove them wrong which makes the best response to prohibit any further studies.

That is some twisted logic.

Diane Ravitch's blog

Trump recently told a group of students attending voucher schools in D.C. that they were very lucky because the graduation rate of the voucher program was 98%. That was far more than the evaluation of the program, which claimed a rate of 82%. But when I re-read the final evaluation report on the program, I couldn’t understand how the evaluators arrived at 82%. Newspaper accounts regularly say that the D.C. voucher program had no effect on test scores but a higher graduation rate. But was it true? What was the attrition rate? How did the evaluators arrive at 82%?

So I asked William Mathis of the National Education Policy Center to explain what was behind the numbers. He very kindly untangled the data for me and wrote the following:

Donald Trump’s Phantom 98% Voucher Graduation Rate

William J. Mathis

​Education secretary Betsy DeVos joined Donald Trump at the White House…

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