In the most elaborate cheating scandal in the history of Chicago's public schools, teachers were caught giving tips, erasing incorrect answers, pointing to correct answers, and filling in the answers to questions left blank on students' Iowa Tests of Basic Skills, which were administered in May to students in grades 3 through 8. The teachers - who face possible dismissal - were nabbed with the help of a method for detecting unusual answer patterns developed by a University of Chicago economics professor. See "Teachers face firing in cheating scandal," by Rosalind Rossi and Annie Sweeney, Chicago Sun Times, October 2, 2002
