A method of using a study aid apparatus is disclosed. The method includes receiving supplemental information associated with a printed textbook. After receiving the supplemental information, it can be loaded into a portable, study aid apparatus. The study aid apparatus is then used to help learn about...http://www.google.de/patents/US20040206809?utm_source=gb-gplus-sharePatent US20040206809 - Study aid apparatus and method of using study aid apparatus
