These online video segments provide you with a valuable resource to review what has been covered in your professors lecture. They help reinforce what you have learned, or expand your knowledge of topics that your professor may not have had time to cover in the course. They are like unlimited office hours! These packages consist of more than 5 hours of video lecture and demonstration and provide review of the basic building block introductory material for your principles of economics course. When packaged with your text you will realize a significant cost savings.