I reviewed the process of matrix multiplication with Sam. We take a row and multiply each entry in it by a column in the second matrix, then take the sum of the products to get a specific number. Sam worked through many problems that had her do matrix multiplication on her own, and also with a graphing calculator. Once I showed her how to do the work on the graphing calculator, she was quick to enter the numbers and do the computation. She did a great job of focusing on her work.