When it's time to find Greatest Common Factor and Least Common Multiple, do your students spend ages making T-charts and factor lists? Not only is this method time-consuming, my students often forget a crucial number pair and come up with a wrong answer.
The ladder method is quick and easy for prime factorization, and a double ladder makes GCF/LCM a breeze! These guided notes walk students through the steps, and the practice page gives students a chance to try it on their own. Answer keys are included!