This operations and algebraic thinking lesson teaches students how to determine all the factor pairs of a number. The lesson includes research-based strategies and strategic questions that prepare students for assessments. In this lesson, students will determine all of the factor pairs of a given number. This is in preparation for later mathematics where students will need to determine a variety of factors for fractions, factoring equations, and several other uses for this particular skill. It is an excellent introduction to factoring and provides several real-world examples for students to practice with.