From the institution homepage or a course homepage, scroll down to the Quick Eval widget. Click on an activity to immediately begin grading, or click on "View all activities" to see a list of items that need grading.

Toggle between individual "Submissions" and whole "Activities" with the buttons at the top left of the page. You can filter by name of activity using the blue link at the top right of the page.

When viewing by submission, you can sort by "Activity Name" and "Submission Date." Click on a student's blue name on the left side of the page to grade that submission.