Several Web sites have emerged in recent years that encourage students to upload old exams to build a bank of test questions and answers that can be consulted by other students. This article reports that some professors have raised concerns about these sites, arguing that these could be used to cheat, especially if professors reuse old tests. Demir A. Oral, a Web designer living in San Diego, started his online test collection, PostYourTest.com, because he felt that such materials were already available to some students but not others. So far, Mr. Oral's site offers more than 500 tests, and about 400 to 500 students have registered to use it. The site is free to students and is supported by advertising. Many of the tests are for courses at the University of California at San Diego, where Mr. Oral recently took a course and where he has promoted the site. More than 40 professors have contacted PostYourTest.com and insisted that their materials be removed.