BBC: Harvard University Massive Cheating in Exams Scandal
Harvard University probes mass exam cheating : BBC News
About 125 students in one undergraduate course are suspected of sharing answers or plagiarising.
Possible cheating was found in about half of exam papers handed in by the class, which has at least 250 students.
If confirmed, the scandal would be the biggest to hit the "Ivy League" of top US universities in recent memory.
Suspicions were first aroused when a teaching assistant noticed several problems with the exam papers, including long passages of identical text in different students' answers, the Associated Press reports.