Moodle Plugins directory: Manual grading by student: Stats | Moodle.org
Manual grading by student
Quiz reports ::: quiz_gradingstudents
Maintained by 
Tim Hunt, 
Mahmoud Kassaei, 
Chris Nelson, 
Anupama Sarjoshi
A quiz 'report' add-on for Moodle, like the nomal manual grading report, but which lets you grade one student at a time, rather than one question at a time.