The Divisibility Test for Three is a very useful problem-solving tool! Use this Task Card packet to teach students how to apply this important rule or use it to help them review and get practice using the rule. The 10-page packet includes 12 Task Cards, cover, notes to the teacher, directions for students, student Answer Sheet, and a complete Answer Key. Students who are adept at using the Divisibility Rule short cuts to find factors of numbers have a head start on mastering many number concepts. Task Cards make practice much more fun than a worksheet. Laminate the cards to use over and over. A consumable Answer Sheet makes grading a snap, and the included Answer Key allows students to check their own work. Perfect for a math center or for practice at individual desks. Grades 4-8.