One way to curb the desire and/or opportunity to cheat would be to assign individualized work. You don't have to go to the trouble of individualizing all student work if you set up an assignment that can apply to multiple situations. For example: You want your students to show their progress with proficiency in Excel and Access. You ask them to visit and select a business of interest. Every part of your course lesson plan can be related to the real-world business of choice. An Excel budget set up for a large department store would be different from a budget set up for a barber shop. An Access inventory for a car parts distributor would be quite different from the categories chosen for a grocery store, etc. In this manner you've individualized the work by using projects than can relate to many situations.