Viewing student grades
Teachers can view student grades via the link in the left-hand menu in any course:
Viewing student progress
Teachers can view student progress via the settings wheel on the right of the top banner:
And then click 'Activity Completion':
Viewing course progress
School Administrators can view course progress as follows:
At the bottom right of the 'Course Completion' table, you can export to CSV which then will allow you to sort by the Progress column in Excel.