Natural measurement refers to the use of common natural objects around us, such as paper clips, footprints, chalk and so on. As a measuring tool for direct measurement, you can only measure ordinary tools, but not standard tools, rulers and straightedges. Use natural objects (such as sticks, paper, bottles, ropes, etc.). ) to measure the length, height, thickness, weight, etc. Or use visual dimensions, steps, etc. )

"Natural investigation" is suitable for the teaching activities of mathematics topics in large classes, so that children can enjoy hands-on operation, sprout their interest in exploring things around them, initially select and use materials and tools, and actively think during exploration, so as to master the correct measurement methods and cultivate their observation and exploration abilities.

Extended data target:

1, initially select and use materials and tools, and be active in thinking during exploration, so as to master the correct measurement method.

I like hands-on operation and am very interested in exploring things around me.

3. Cultivate children's observation ability and exploration ability.

4. Develop visual perception and judgment.

5. Develop good qualities of thinking, doing, studying hard and being happy to learn.

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