Montessori mathematics has a set of classic teaching methods and classic teaching AIDS, and Qi's greatness lies in making abstract and almost boring mathematical models interesting, similar to the operating system of intellectual toys, and Saigen board is one of them.

Segen board is divided into two groups. Generally, Segen board 2 is a work from Montessori mathematics area, which is divided into Segen board 1 and Segen board 2, in which Segen board is composed of two boards with five squares, and root board 2 is also called dozens of boards, because heel board 2 is composed of dozens of boards.