1. Experimental observation is the first and most important step in the teaching process. Judging from the requirements of direct experience, experimental observation is the basic method to acquire knowledge and the key for children to make scientific inventions in the future.
2. Although experimental observation is the basis of learning, indirect knowledge cannot be excluded, because not everything can be observed through experiments conditionally and things cannot be thoroughly understood through perceptual experience, so indirect knowledge and direct knowledge complement each other and are indispensable. Reading and thinking can make up for the lack of experimental observation.
3. Children's direct and indirect knowledge and experience gained from experimental observation and reading thinking need to be processed and expressed in the form of stories, reports and speeches, which is helpful to cultivate and embody children's initiative and creativity.
4. Children's conclusions in learning can't be completely correct. They need collective and group discussion and joint research, so as to inspire and encourage each other and achieve perfection.