Virtual Grade Book

I just finished my Literature Review paper and it was on electronic grade books. Some agree that electronic grade books are a great tool and others believe that they are not. Most say that electronic grade books are only helpful for the secondary grade level. I believe that an electronic grade book is a very helpful tool because it averages all the students’ grades without any help from the teacher. This gives the teacher more time to work on lessons and spend more time with his or her family. When I become a teacher I will use an electronic grade book because it will save time and also the parents will be able to look up their child's grades at any time. I think it is a very helpful tool. What are your thoughts on electronic grade books?