'It's hard to improve public education—that's clear. As Warren Buffett would say, if you're picking stocks, you wouldn't pick this one." Ten years into his record-breaking philanthropic push for school reform, Bill Gates is sober—and willing to admit some missteps.
"It's been about a decade of learning," says the Microsoft co-founder whose Bill and Melinda Gates Foundation is now the nation's richest charity. Its $34 billion in assets is more than the next three largest foundations (Ford, Getty and Robert Wood Johnson) combined, and in 2009 it handed out $3 billion, or $2 billion more than any other donor. Since 2000, the foundation has poured some $5 billion into education grants and scholarships.