Online Workbooks Powered by MyELT, Online Workbooks have both teacher-led and self-study options. This contains the 10 National Geographic video clips, supported by interactive, automatically graded activities that practice the skills learned in theS tudent Books. Student and Instructor eBooks Powered by VitalSource® Bookshelf, our eBooks give learners fully integrated online, downloadable, and mobile access to their programs. Work on a laptop, log in from the library, or use on a smart phone