The Progress page shows your grade on various assignments. The "average" is the percentage of points you have earned so far for a particular assignment type out of the total possible points for all assignments of that type. As you complete more of the course, you should see your averages increase.
When you are working in a course, you can see your progress in the navigation bar at the top of the page. Each unit that you complete has a green check mark. Ensure that you are completing all course content, which should raise your grade.
For details on individual problem scores within an assignment, see View Your Grading Details.