A stay-at-home mom in Maine. A physics teacher in an under-supplied school in Quito, Ecuador. A food-service-supply salesman in Lancaster, laid up for months with little to do after a hang-gliding accident. And two out-of-work West Philadelphia men looking to take an intellectual journey from their living room.
They are among millions around the world who have been attracted to Yale University’s free courses on the Web, complete with audio and video lectures, syllabi, and supplementary materials.