Description:
 
Binomial Square is a wooden box containing 4 two- dimensional pieces to represent the formula (a b)2 =a2 b2 2ab.
The lid is printed with the corresponding colours of red, blue and black to help the children assemble the pieces.
The control is screened onto the lid.
Binomial Square is for introducing mathematical concepts of algebra. The factors of the equation are represented by the squares.