Dr. J. Philipp Schmidt, a research scientist here at MIT, talks about Peer 2 Peer University (P2PU), an online platform that supports peer learning, a type of collaborative learning. In peer learning, learners are responsible for their own learning trajectory but by working together, they learn about a topic as well as other skills. Principles such as openness and creative learning guide the design of this type of community. Check out the segment where Philipp discusses the four Ps (4:10 in the video).