Four years ago, Jessica Markowitz was moved by accounts of the 1994 genocide in Rwanda from a visiting speaker, Richard Kananga, who stayed at her family's Seattle home. His report of orphaned girls in the village of Nyamata who couldn't afford schooling especially broke her heart. So Jessica started Richard's Rwanda-IMPUHWE, a nonprofit organization to raise money to educate the girls. "It takes about $40 for a girl to go to school for a year," she says. Jessica, a freshman, has hosted bake sales, spoken at conferences in Washington, D.C., and will visit Rwanda for the fourth time this summer.