“Juan D. Martínez was one of the original students. With Mr. Lang’s help, he earned a philosophy degree at Swarthmore. On his own dime, he went on for a law degree at the University of Pennsylvania. Now he is a diplomat at the State Department in Washington, a veteran of postings in Mexico and Britain. He remembers meeting Mr. Lang several times a year as a teenager to talk about goals and ways to reach them. ‘We definitely got a lot more out of it than just a tuition check,’ Mr. Martínez said.”