Brightly color-coded, plastic base ten blocks visually represent ones, tens, hundreds and thousands so students can visualize and quickly differentiate place value. Color-coding helps students apply their understanding of concepts to new contexts. Students will begin to make mathematical connections when they see that yellow always represents units, green equals tens, and so on. Includes 100 yellow cubes, 10 green rods, 10 blue flats, and 1 red thousand block. 121 pieces.