I would imagine you could learn a lot about peer education from the &quot;one-room&quot; schoolhouses in developing countries. By necessity, there aren&#x27;t enough teachers to go around, and all the students of different levels are learning together. If students manage at all in such an environment, it&#x27;s because they&#x27;re learning from their peers. (Maybe not in an <i>effective</i> manner; there&#x27;s no formal encouragement of the practice and nobody is given any collaboration tools—but there are probably still learning strategies that can be derived from what students <i>do</i> manage to accomplish.)