Linda B. Sherrell Chang Liu William M. Pottenger Paul Gross NSF-DGE GK-12 teaching fellowships: changing student perceptions about computer science. 474-475 2007 conf/sigcse/2007 SIGCSE http://doi.acm.org/10.1145/1227310.1227470 db/conf/sigcse/sigcse2007.html#SherrellLPG07