I have been experienced about plagiarism. Two years ago, one of my friends did plagiarism but he did not know what thing is his wrong. He just wanted to quote good sentence for his papers. He was not Native American either like me. He has one of habit that when he finds good sentence, he frequently writes in notes. However, teacher was angry about his paper. In other hand, he just came here two months ago, he could not communication to American people includes teacher. So their misunderstanding went against as time goes on. Problem paper's the most difficult thing is about issue because it difficult to build up. It should be not general things, too detail and relate to thesis. Actually, the hardest thing is making a thesis sentence. It contains many sorts of things that it should express about topic. I think the most important issue is education for plagiarism. In my opinion, our life always has many things for learning. For example, we can learn smile at children's. Like this, we are steadily learning. If we educated students about plagiarism, they would not plagiarize any more. All students need to educate about plagiarism before writing their papers.