Here's a rundown on SecondAct.com awards honoring 2011 standouts in eight categories.
More in Game-changers
December, 26 2011
Day 8: The former Microsoft exec's ambitious literacy program opens new libraries daily in impoverished countries worldwide.
December, 19 2011
Honoring the game-changing, rule-bending innovators who raised the bar for the rest of us in 2011.
December, 23 2010
They're urban farmers, health care activists, school builders and volunteer counselors who're working to make the world a better place.