@article{2524,
  author = {M. Smith and W. Wood and W. Adams and Carl Wieman and J. Knight and N. Guild and T. Su},
  title = {Why Peer Discussion Improves Student Performance on In-Class Concept Questions},
  year = {2009},
  journal = {Science},
  volume = {323},
  pages = {122-124},
  month = {Feb-01-2009},
  issn = {0036-8075},
  doi = {10.1126/science.1165919},
}