What are Course Reserves? My instructor says there are books, DVDs or e-reserves for the course.
Course Reserves are things like books or DVDs that are held at the library (usually Main Library) for short-term checkout, so that the whole class has a chance to use them. You can find these items in the Course Reserves section of InfoHawk+, searching by the title, instructor's name, class name, etc.
E-reserves are full text articles or book chapters available to students in a specific course, and are listed only on the course ICON site. They are not listed in InfoHawk+.
See Main Library Reserve Services for more detail, including loan periods and overdue policies. For reserves at UI Libraries other than Main Library, see that library's home page.