"Charter schools are public schools. They're paid for publicly and they're part of the public system. They just have a more independent structure."

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The only role other than paying their taxes, whatever those are, the only role for philanthropy broadly - of which the rich should give disproportionately - the more, the better - and I think there is a positive trend in that direction - there are certain risk-taking things, like trying out a new type of charter school or funding a new kind of medicine.

— Bill Gates