The Course Navigation section of the displays the course activities that have already been attempted by the student. As the student progresses through the course, the navigation tree continues to expand. Units, topics, and lessons are all grouped into collapsible sections, which can be expanded by clicking on the + to the left of the desired section. Specific activities within lessons are displayed in bulleted lists. The current activity the student is working on will be highlighted in yellow, and the current activity selected will be highlighted in blue. If the selected activity is the current activity, it will be highlighted in blue with a yellow border. Activities in grey are bypassed.