J. D. Dougherty Susan H. Rodger Sue Fitzgerald Mark Guzdial Proceedings of the 39th SIGCSE Technical Symposium on Computer Science Education, SIGCSE 2008, Portland, OR, USA, March 12-15, 2008 SIGCSE ACM 2008 db/conf/sigcse/sigcse2008.html 978-1-59593-799-5