For instance, several daily deal sites give small portions of their donations (5% or so) toschools and other charities, but none can currently match the 15-50% that schools can make per purchase using the Schoola model.
He also claims that Mortenson, a former mountaineer, has mismanaged and misappropriated hundreds of thousands, if not millions, in donationsto his Central Asia Institute which builds the schools.
DonorsChoose.org was created in 2000 by a teacher who sensed that many people would like to help distressed public schools, but were frustrated by a lack of influence over their donations.
Among Roth's accomplishments: designing networks for kidney donations and creating elegant systems that enable huge urban school districts to optimally place multitudes of students among hundreds of schools.