The Grading Center provides you with a one-stop place to go for all your grading. From the Menu you can find the link to the Grading Center in the Control Panels.
When you open the Grade Center you see some choices like this:
You can simply see what needs to be graded or you can view the Full Grade Center or just Assignments or Tests
If you select the "Needs Grading" option, you will be presented with a list of all the items in your class that need to be graded. Here is an example of what you may see:
As you can see, in this class a Journal and a test titled "Session 2 Quiz" needs to be graded
If you hover your mouse next to the title of the item, you will see a pull down arrow which gives you the option to grade the item