Developing Essential Understanding of Number and Numeration in Pre-K-Grade 2 Barbara Dougherty, Alfinio Flores, Everett Louis, Catherine Sophian 310 kr.
Putting Essential Understanding of Addition and Subtraction into Practice, Pre- Barbara Dougherty, Karen Karp, Janet Caldwell, Beth Kobett 335,25 kr.
Putting Essential Understanding of Multiplication and Division into Practice in Barbara Dougherty, John Lannin, Kathryn Chval, Dustin Jones 333 kr.
