In my last Mere Mini, I showed a method for squaring up board edges using a router. If you don’t have a router, you can make an edge-jointing jig for your table saw. It’s very simple to make. The most important part is to have a straight board to run along your rip fence. The best thing to use is the factory-cut edge of a sheet of plywood. If you have trouble finding the toggle clamps locally, here is an inexpensive one on Amazon.