Pocket Charts! Pre-Number SortingGood Neighbor Press, IncMatching shapes and colors, and learning the concepts of few-or-many and big-or-little are the basic skills necessary for understanding mathematical relationships.Available For: iPad ($0.99)Pocket Charts! Pre-Number SortingGood Neighbor Press, IncMatching shapes and colors, and learning the concepts of few-or-many and big-or-little are the basic skills necessary for understanding mathematical relationships.Available For: iPad ($0.99)