The concept of statistical graph is various graphs drawn by statistical means such as geometric figures, image of things and maps. It is intuitive, vivid and concrete.

Sector statistical chart uses a circle to represent the unit "1", and each part is represented by a sector, which can intuitively represent the size relationship between the part and the whole. The sum of the sectors of each part is this circle. Kindergartens perceive numbers through statistical charts and experience the fun of statistical activities.