Backlash against high-stakes school testing

Seems parents and students and teachers are against putting too much reliance into testing (April 2013). Why are privatized schools (I use that term to distinguish the corporate schools from traditional private schools that are designed to draw in wealthier clients) so fond of testing? “They don’t want parents to measure a school on anything other than a number because they’re not offering anything other than a number.“ Privatized schools looking good, in theory anyway, because of the tests that students constantly take, not because students are turning out any more thoughtful or competent or skilled.