If you have multiple graders in your course and you need to assign each grader a set of students; then, you can use groups to do this.
Randomly assign the students to groups and assign each grader a group(s).
If you have other group work in the course then you should know that you cannot hide groups from students. If you have the groups for the gradebook obviously named then I would have to express a concern for students sucking up to their grader for better grades. To work around this, divide the students into their working groups and assign graders based on those groups. This way students won’t know the gradebook is being divided or who is grading their work.
Channell Walker 