This document outlines a math lesson on multiplication and factors. The lesson includes fluency practice problems with addition and equal groups, an application problem involving the number of eggs in a carton shown in an array, and a concept development activity where students divide into equal groups. Students then define the factors of a multiplication problem as the number of groups and the number in each group, drawing arrays and number bonds to represent different multiplication sentences. The lesson concludes with a problem set, debrief, and exit ticket to assess understanding.