Almost all of the work students do in my class, including quizzes, are done in their notebooks. Grading the notebooks is time consuming, but in the long run I believe it helps most of them. I also allow my students to make corrections to assignments for full credit. This can make grading a nightmare. My solution has been to keep a spreadsheet separate from the official grade book. As I grade the notebooks, I can add old assignments (colored in green), and change grades on assignments that have been corrected (shown in yellow). This way when I am done grading all of the notebooks for a class, I can more easily and efficiently entered grades officially.