It is fun to read about software that detects cheating by students, teachers, and invigilators in your Technology Quarterly (“Beating Cheating,” June 4, 2011). Firms like Prometric of Baltimore, Maryland, Caveon of Midvale, Utah, and Kryterion of Phoenix, Arizona, are getting to grips with widespread cheating practices across the globe. Some of the software looks even at sudden improvements in scores by a student by comparison with his or her previous attempts. Crossing international borders to take a test is suspicious, too. The scrutiny does not stop when the tests are over, either. The software hunts day and night for illicitly revealed test information. As you report, Prometric now detects so much cheating that it investigates about twenty of its five-thousand test centers around the world each and every week. It is good to know that American firms are behind this concerted effort. Surely, they would know best. Like so many other things, cheating practices now in vogue must have been hatched in America, as well.