Data such as standardized test scores can only tell us so much. For one thing, children are not standardized.
Calling education a public good is potentially dangerous.
In 1926, J. Gresham Machen testified before a congressional committee regarding a proposed federal department of education. In the first minute of his testimony, he explained that the purpose of the bill was “to promote uniformity in education,” which, he asserted, “is the worst fate into which any country can fall.”
“Perhaps the voucher movement ought to be called the ‘Make schools accountable to parents’ movement.” – Arnold Kling
Why is a model of education that is also profitable seen as such a bad thing?
“The State shall make no law with respect to the establishment of education.” – Austrian philosopher Ivan Illich