This may be due to a decision that was made by your institution.
If the Grades feature is enabled, then you should be able to select the desired course and see "Grades" in the Course Map where "Announcements" and "Assignments" are located. Some institutions disable this feature so that grades can only be seen after a certain date.
If you are interested in the configuration of the Grades feature at your institution, we would like to suggest that you contact your institution's help desk for more information.
If your school has enabled the grades tool and you still cannot see grades, please contact our Support Team.