Nearly five years after President Obama announced the creation of the Social Innovation Fund (SIF) in a ceremony at the White House, the program has achieved amazing progress. Its portfolio includes more than a half billion dollars of cross-sector investments in effective community solutions. Many already show promising early results. Nonprofits are establishing new connections and building capacity that will benefit the entire social sector and the country. And the SIF is accomplishing this in a way that demonstrates the importance of combining innovation, evaluation, and scale to accelerate the pace of change.