If you take 5 squares of the same size and join them edge to edge, the resulting shape is called a Pentomino! There are more than 2000 ways to arrange the 12 different plastic pieces to form a rectangle. Available in single sets of 12 pieces, or 18 sets with a teacherís guide from the SI Resource Series.
Desk-top blocks made of top-quality polystyrene plastic. With the attributes of size, shape, color and thickness, they assist in the development of problem solving using logic. The related sizes make them useful for demonstrating fractions and their relationships. Set contains 60 pieces in 5 shapes, 2 thicknesses, 2 sizes and 3 colors, plus a storage tray, and a teacherís guide from the SI Resource Series.