Access to course description and goals from homepage. Some commonality between course pages. The link or context surrounding the link is descriptive to anyone. Text and Background Words are spelled correctly. Background does not interfere with reading of text.
Normal case is used.
Tags Title tags are used and are descriptive. The link or context surrounding the link is descriptive to anyone. GIF throws away horizontal color redundancies JPEG throws away pixels. The user can tell the program how many pixels must remain intact. Reduce the number of distinct images to be sent.