This is a packet that covers basic addition and subtraction skills. It is aligned to the new Common Core standards with a focus on Operations and Algebraic Thinking. This packet aligns most closly with kindergarten, first, and second grades. However, it would be extremely beneficial for third and fourth grade teachers who are working with remedial students on a review of basic skills. In this packet you will find: * A list of books that can be used with this unit (correlates with the literac