I needed a solution for my kids backpacks and disorganized papers. I was able to come up with organizer using a quarter-sheet of plywood, a fence board, and a 4' hobby board. It involves ripping the plywood into smaller strips, so I table saw would be helpful, but the project is totally do-able with just a skill saw.
You basically notch 3 divider boards, attach it to a piece of plywood and build a box for each cubbies. I added lag screws and washers for decoration, and some small coat hooks for storage.