It never amazes me that students, in smaller classes under 25 think that an instructor will not see them cheating, for example,keyboarding. There are always a couple of students that hand in work that repicates another. What is more amazing is that they think you will not figure it out! I always give them an option. I bring the students in the conference room and ask the question "Is there something about your work you would like to share with me?" When they do not come clean, I give them thier options dictated by the school. I also make them sign their papers. Thier signature validates that is is their own. This way they can't say they took someones elses paper by mistake. I also make them sign them in a sign in sheet. Also, students who are trying, putting in 100% effort in class, homework and tests always rat the cheaters out.