A good technique for straightening a board on a table saw is to attach it to a straight board and then rip it.
Wood slabs can make great tables. The problem is getting them flat. The coolest slabs are usually too big to go through a planer or sander, and end grain slabs shouldn’t go through a planer anyway. Fortunately, there is an easy way to flatten any oversized board using a shop-made jig and a router. Here’s how.