Most children in life have a preliminary understanding of "size", and the teaching goal of this lesson is to let children distinguish the difference between height and height, which is similar to "size", so with the previous foundation, the knowledge involved will not be too wide, so there will be some experience when it is implemented again. It is absolutely surprising that the phenomena revealed by young children are quite general and vague.

First of all, invite Xiaoming's family to visit our class. We can identify these family members through children's observation. How many people are there in the family? There is also a problem of decimals. A few children have not fully mastered the basic essentials of counting, the law from left to right. When I got it, I proudly told my teacher, "There are three teachers in their family." There are still some children who don't understand the repetitive problems, so mathematics can't be reflected only in the classroom, but more depends on the usual education and slowly digested in the actual operation. The second part is the focus of this lesson: taller than height. Are all the people in this family the same height? Before your voice falls, your child can't wait to help you find out the difference, and can accurately and concretely distinguish who is older and who is younger (the child's serious height is changed into size). Their subconscious has stored the past, and the "size" is slightly modified and cannot be immediately distinguished. It seems that a relatively common and simple teaching goal is really difficult to implement in a hurry. Don't forget that they are just children. What they do is efficiency rather than speed, especially in small classes. According to the situation of children, carefully distinguish the difference between size and height, guide them to say "tall, short and shortest" and feel the height, and encourage children to say boldly: "* *, I will take you home."