The Pythagoras board set consists of a red wood-framed board with a silk-screened grid pattern and the numbers one to ten printed along the top and left sides. A separate box contains white wooden tiles representing the multiples of each number from one to ten which students then place in the appropriate grid square. For example, in the square where five seven intersect a student would place the "35" tile. Where eight and two intersect a student would place "16" and so on. The board is 35.5 cm (about 14") per side, and the tiles are 3 cm (about 1") square. A printed Control Chart is available separately.