EDUSPAT: Education Week's Jason Tomassini has been keeping tabs on a feisty Twitter exchange between Diane Ravitch and Department of Education spokesman, Justin Hamilton, over the role of entrepreneurs in education. The banter's worth checking out, especially given Ravitch's itchy Twitter fingers. "I have never met a teacher who looked for ways to make a buck off his/her students, like for-profit orgs now prowling for $" she tweets.

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