Jigs will catch any species in fresh or salt water. This article contains all you need to know to learn jig fishing. Focus on the "how to". The slider is a great bait, but the method works with ANY jig. Also, you don't have to use the weedless jig heads shown here. (I prefer an exposed hook.)
Charlie Brewer's Slider Company - ******* Weedless Crappie Slider "Why&How"