"We're very grateful to the 18 colleges and universities that have committed to this challenge," Secretary Hess said. "We're also excited to hear that the challenge has sparked interest among non-memeber schools that are looking at joining the PCIEP." The challenge pits colleges and universities across the Common wealth against one another to see which school can increase its recycling percentage the most. The challenge is during an eight-week period from October 7 to November 30.