WAKEFIELD-- Congressman Jim Langevin (D-RI) was the keynote speaker at a ceremony celebrating the 2011 graduates of the Education Exchange, an adult education center in South County. More than 90 graduates were recognized at an event at the Prout School in Wakefield for receiving their GEDs through the Education Exchange GED Testing Center as well as the Education Exchange GED Preparation classes. Established in 1978 as the Washington County Adult Learning Center, the Education Exchange is a non-profit organization providing literacy programs and GED preparation and testing for adults in southern Rhode Island. It offers courses at sites in Wakefield, Westerly and North Kingstown.