This document discusses models for multiplication including rectangular arrays, area models, and square numbers. It provides examples of using rectangular arrays to model 3 rows of 5 columns equaling 15 total objects, and using area to model 4 squares on each side of a rectangle for a total of 4 x 4 or 16 squares. Square numbers like 4 (2x2), 9 (3x3), and 16 (4x4) are also covered as a model for multiplication.