Use this handy magnetic set to easily demonstrate base-ten number concepts on the whiteboard! Giant magnetic Ten-Frames and colorful discs allow students and teachers to engage with base ten and other number and operations skills (addition and subtraction) as a group. Helps teach to Common Core State Standards including Numbers & Operations Counting & Cardinality Operations & Algebraic Thinking. Set includes 4 magnetic frames 40 discs (20 green 20 blue) and Instruction Guide. Frames measure 12¼inL x 5inH. Games/Manipulatives Type: Math Manipulative; Age Recommendation: Grades K and Up.