我国小学自然教学的先驱和导师——刘默耕老师认为:“自然的每一节课都应该是一个开放的系统……每一节课好比是起一个典型示范作用,每一节课,好比是在小孩的脑海里投进去一块石头,给他激起波浪,让它扩展到他日常生活里面去。”而“自然教学的开放系统” Pioneer and mentor of primary school nature teaching in our country - Liu Mogeng said: “Every lesson of nature should be an open system. Every lesson is like a typical demonstration. Each lesson is like A child throws in a stone in his head, provoking him with waves and expanding it into his daily life. ”And the“ open system of natural teaching ”