For 12 weeks last summer, Lauren Valentino ’10 taught underprivileged rising 9th graders how to speak French and read Hamlet – all while most of her students were still learning English as a second language. Valentino was in Denver, Colo., working with residents who had recently moved to the U.S. from Ethiopia, Afghanistan, Eritrea, Kenya, Mexico and Columbia, to name a few. "One student was a refugee from the Ivory Coast and had no formal schooling until three years ago," says Valentino, a sociology and French major. "He was one of my brightest kids." As a student-teacher working at the…