These color-coded cards provide students with a visual representation of place value and help them develop number sense. Teachers use these cards to visually show expanded form of numbers by place value, greater than, less than, addition and subtraction without regrouping, multiplying numbers, and more. (Color-coding system matches Sensational Math™ Place Value Discs.) The cards are all 4" high and range in length from 2-1/2" to 10", depending on place value. Each set is packaged in a re-sealable poly bag for handy storage. Includes 10 each of 4 values: Ones, Tens, Hundreds, Thousands. 40 total cards. Grades 1–3.