Use this Multiplier Board to model multiplication, to represent fractions and as the basis for the area formula. The Multiplier Board quickly and clearly illustrates that an array with 6 rows and 7 squares in each row, has the same number of squares as an array with 7 rows with 6 squares each, proving that 7 x 6 = 6 x 7. The plastic board measures 8.5" x 8.5" and is printed with numbers on one side and solid red and blue circles on the reverse. Grades 3 +.