Use course tools>>Virtual Classroom>>Browse archives
To remove an archive of a previous session:
Click the course title on the My CourseCompass page.
Do either of the following from the Course Home page:
Click Control Panel, click Virtual Classroom under Course Tools, and click Browse Archives.
Click Communication, click Virtual Classroom, and then click Browse Classroom Archives.
Note: You can add a Virtual Classroom button to the navigation buttons, along with Communication, Course Information, and so on. If you have done so, you can click that button to open the Virtual Classroom.
Click Remove next to the date of the archive you want to delete.
At the prompt, click OK to delete the archive. Click Cancel if you change your mind.