Array of Dots: Adjustable Dot Grid

① This example demonstrates how to create adjustable arrays of dots in GeoGebra, where dots are arranged in rows and columns to visualize multiplication, area, or combinatorial counting. ② Core mathematical concepts include area, numbers, combinatorics, and arithmetic mean; the dot array helps students understand the relationship between multiplication and area, and can be used to explore counting problems. ③ Construction uses the Sequence command with parameters a and b to control the number of rows and columns, generating the list L_1; teachers can drag sliders to change a and b and observe the total number of dots. ④ Suitable for upper elementary to middle school for area and multiplication visualization, or high school for introductory combinatorics; also serves as a template for teachers to create interactive exercises that support student exploration of array patterns.