Interesting exercise, compare the length of pictures and compare the length of the same object. Please look at the pencil in the picture. Which pencil is shorter? Draw red in the circle under the longest pencil and blue in the circle under the short pencil.
You can also operate in groups to consolidate methods. Let the children compare different objects in the small basket, and two adjacent children communicate with each other. The teacher will tour the guidance, focusing on the children who can't master well.