Factorization “Crossnumbers”

Factorization “Crossnumbers” is a Grade 4 factors activity that turns the board into a connected chain of factorizations. Teams choose numbers, apply divisibility ideas, and write factor pairs so each new entry connects vertically or horizontally to the existing work. The shared layout encourages students to think strategically about which numbers have useful factors while noticing patterns across the completed chain.

Use it as a small-group or whole-class challenge when you want factor work to include reasoning and discussion. After play, the board naturally supports questions about numbers with many or few factors and repeated factor patterns. Create a free Find a Math Game account to generate the lesson for Factorization “Crossnumbers.” No credit card; 3 lesson generations for life.