Have one binder with tabs for every student so that you can keep track of students progress with checklists and samples of work.
I was doing some assessments today with some students and the teacher gave me a binder with all of the students information and what they still needed to work on. It was really well organized and easy to access all the information. It was also easy to look at for someone who did not create it. All together it was a really simple system with the checklists hi lighting what was on the report card.