Included in this product are four 8.5 x 11 documents. The first document includes all three diagrams, the remaining three are each a large version of each diagram. Use these diagrams (change to more/less, parts-and-total, comparison) to help students organize information given in number stories before writing a number model. The diagrams help students see how the numbers are related to each other while letting them see what piece of the relationship is missing. Each diagram can be used in many