Allison Elliott Tew Charles Fowler Mark Guzdial Tracking an innovation in introductory CS education from a research university to a two-year college. 416-420 2005 conf/sigcse/2005 SIGCSE http://doi.acm.org/10.1145/1047344.1047481 db/conf/sigcse/sigcse2005.html#TewFG05