@InProceedings{leacock-gamon-brockett:2009:NLP-Education,
  author    = {Leacock, Claudia  and  Gamon, Michael  and  Brockett, Chris},
  title     = {User Input and Interactions on Microsoft Research ESL Assistant},
  booktitle = {Proceedings of the Fourth Workshop on Innovative Use of NLP for Building Educational Applications},
  month     = {June},
  year      = {2009},
  address   = {Boulder, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {73--81},
  url       = {http://www.aclweb.org/anthology/W09-2111}
}