At Ohio State University, a Chinese student took tests for Chinese classmates for cash last year, guaranteeing an A.

At the University of California, Irvine, some international students used a lost-ID-card ruse to let impersonators take exams in place of others.

At the University of Arizona, a professor told of Chinese students handing in multiple copies of the same incorrect test answers.

A flood of foreign undergraduates on America’s campuses is improving the financial health of universities. It also sometimes clashes with a fundamental value of U.S. scholarship: academic integrity.

A Wall Street Journal analysis of data from more than a dozen large U.S. public universities found that in the 2014-15 school year, the schools recorded 5.1 reports of alleged cheating for every 100 international students. They recorded one such report per 100 domestic students.

Students from China were singled out by many faculty members interviewed. “Cheating among Chinese students, especially those with poor language skills, is a huge problem,” said Beth Mitchneck, a University of Arizona professor of geography and development.

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