When you are in the desired course, click on the grades tab to view when assignments are due and what your grade is.
This is what it should look like after you have clicked on the tab.
Here is where you can view when the assignments are due, assignment group, module and title.
Here is where you can see your listed assignments, the due date, the score, how many points the assignment is worth and you can view the professor's comments.
This is where you can view your total grade in the course.