The Education of Bill and Melinda

The Gates Foundation has spent over $1 billion to fix the troubled U.S. high school system, and the Gateses have learned a lot along the way

The world's biggest philanthropists, Bill and Melinda Gates, are best known for tackling some of the most vexing issues in global health -- AIDS, tuberculosis, and malaria in developing nations. Their $29 billion foundation has saved countless lives, providing vaccines and other drugs in far-flung regions where health care is poor.

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