I am SO excited to find this resource! Fourth Grade Common Core Workbook is packed full of resources and organized by standard, this is a fourth grade teacher's dream! There are over 850 pages of activities and centers!! Download a sample of the book, and I know you will be as excited as I am to start using it.
Also, check out their great giveaway if you'd like to win it for free! Act fast, it ends April 21.