Practice and reinforce the content from the Common Core State Standards with these innovative activitycard sets. Students first solve the problem on their own card; then students with the same answer formcollaborative groups for further problem-solving activities. Or use cards in smaller groups to give studentsadditional practice with the content they need to know.Each set contains 120 cards, 40 cards per grade level, that can be assigned on- or off-grade level as necessary.Durable, two-color cards measure 4" x 6" . Teacher's guide provides complete instructions, includingsuggestions for problem-solving lessons for the collaborative groups.