The best guide to using Canvas is found at the Canvas Community site in Guides. We will add a few items of note, tips, clarifications, etc., on this page as needed.
To add or remove classes from your Dashboard, go to Courses (in Global Navigation bar on the left) and select All Courses. From this list you can choose which classes are visible on your Dashboard view by clicking on the star to the left of each course. To remove a course from the Dashboard view, uncheck the star... to add, check the star.