Recently -- like, last week -- it was explained to me that the German tradition of essay writing differs sharply from the English one. American and British students are taught to write thesis-proof papers: set forth a central idea upfront, write points and cite texts or research supporting that point, and finish with a restatement of the central idea or a discussion of its applicability (in the case of scientific articles).
German essays, on the other hand (including the ones my university students have studied throughout their long schooling), are structured differently. An argument often examines all sides of an issue. The essay may start anywhere, since the point is often not manifest until the end.
All this clarifies a question that a student asked me last Monday after class, a question I did not understand at all. She said, regarding the paper I had assigned, "So do you want us to write this in the style we were taught before?" I said, "Style won't count as much as content. I want to hear what you have to say." But now I think she meant "structure," not what I was thinking of as style (voice, eloquence). These students at the Institute for American Studies were taught, in their first year, the American style of paper writing. By failing to say that's what I want now, who knows what I will get.
I will try to clear this up in class today, but the papers are due next week and it's possible that many of them have started to write (I hope). But I will try. The difficulty with cross-cultural differences in that if you don't know the divide is there, it's hard to build a bridge across it.