Students unfamiliar with this facility can practice now by bookmarking this page. If your browser or environment is subject to frequent unplanned interruptions, you might plan to bookmark periodically within every session. Both browsers also provide the capability to delete old bookmarks.

Navigation through the course is accomplished with the "Next" (green) and "Previous" (white) arrows, as seen below on this page. If you experience difficulty displaying the pages of this course on a single screen without scrolling, you may wish to generate additional display space by temporarily hiding some of the browser's toolbars. The toolbars can be removed using the "View" menu on the major browsers. Also check that the browser window has been maximized.