When I make seating charts, I write students' names on post-it notes and place them on a paper with desks drawn on it. Then, I put the chart in a sheet protector. This works very well because students can be moved quickly and easily when their seating assignments don't work. When I need a new arrangement, I don't have to rewrite every name. This also gives me a fast way to record the students' grades. I use an overhead marker on the seating chart and then record their grades in the gradebook later.