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Sometimes, people look at something like a foundation or our foundation and say, my gosh, they have huge resources.

And the truth is, when you look at the scale of the problems we’re going against, the state of California spends slightly under $30 billion a year educating their kids. So our entire foundation is $30 billion. So we could spend — spend our money all in one year just in the state of California.

But we don’t do that. What a foundation has to be is to be a catalytic wedge. It can take innovations and show where they work. It can measure them. It can show what doesn’t work and take the problems apart. And it’s ultimately for governments to scale up.

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Melinda Gates on the Bill and Melinda Gates Foundation’s efforts to reform education