By Jeff Erickson, CS professor, University of Illinois at Urbana-Champaign I remember this one kid who pulled the absolutely perfect scam. First, he got a copy of the book that the class was based on, since he knew from past students that the exam would cover material directly from that book. Then, every other day, starting at the very beginning of the semester, he would sneak into the room where the professor was teaching and take notes. Occasionally, he would even ask questions! Then later that same day, he would review his notes to make sure he understood everything. At least once a week he