Today teachers at half of all the public schools in the nation have had at least one teacher post a project to DonorsChoose.org, whose supporters include board member Stephen Colbert, Oprah Winfrey and the Bill and Melinda Gates Foundation.

FORBES: DonorsChoose's Charles Best: Pioneering Citizen Philanthropy

This post is part of a project to crowd-source the December 20 issue of Forbes magazine.

FORBES: Names You Need to Know in 2011: Exhibition A

This post is part of a project to crowd-source the January issue of Forbes in a special report called Names You Need To Know.

FORBES: Name You Need to Know in 2011: The Daily