Michael Heilman, Alan Juffs, Maxine Eskenazi. Choosing Reading Passages for Vocabulary Learning by Topic to Increase Intrinsic Motivation. In Rosemary Luckin, Kenneth R. Koedinger, Jim E. Greer, editors, Artificial Intelligence in Education, Building Technology Rich Learning Contexts That Work, Proceedings of the 13th International Conference on Artificial Intelligence in Education, AIED 2007, July 9-13, 2007, Los Angeles, California, USA. Volume 158 of Frontiers in Artificial Intelligence and Applications, pages 566-568, IOS Press, 2007.