Since it is for first grade, I would just purchase Evan-Moor workbooks to use for the Language Arts. We didn't start a formal L.A. curriculum until second grade. For the SS/G, I would use living books. Rebecca Rupp's book Home Learning Year by Year gives excellent grade guidelines for what you should be covering and book titles. We always put History/SS together with Geography. Great reinforcement to find the location on your world/U.S. map of whatever you're studying.