"Plagiarism in our classroom was a surprise because at the beginning of the semester we explained why plagiarism was bad, the consequences of plagiarism such as getting a zero and being kicked out of class, and then had the students sign a contract vowing that they would not plagiarize."
So what happened after this preparation: "And then Some students used Chinese language propaganda pamphlets and just translated them into English and pasted them into their essays. Others lifted whole passages from Wikipedia as their own."
Peter then theorises about possible cultural causes. Read more here.