Step 1: Introduce the topic and define the task.
This link is mainly to stimulate children's interest and put forward research tasks. Talk, riddles, pictures and other leading-in methods can be used to guide children to analyze and reason according to key information, reveal the mystery, and at the same time derive the theme of activities.
The second link: guide observation and exchange findings.
This link is mainly to guide children to observe, discover and obtain information. Generally, physical or picture observation and video playback are adopted. Teachers can use different methods to help children construct knowledge according to different points.
There are three activities in the core part: the first is collective observation to get an overview. The second is to observe carefully and discover personality. The third is that you ask me and answer, expanding your experience.
Obviously, the second activity is the focus, while the first and third activities are not. Therefore, the teacher has a detailed approach in dealing with it, with gains and losses. It not only enriches children's perceptual knowledge of snails, but also develops children's language expression ability.
The third link: provide support and dispel doubts.
When the important information obtained by children is not comprehensive enough to highlight the key points, teachers should provide support for children again, inspire children to analyze and help them solve their doubts. Teachers use graphic method to record collectively, and then play targeted video clips, so that children can find more information purposefully, and finally guide children to sort out the information about butterfly life completely according to graphic method.
The fourth link: summing up accumulated experience.
The main purpose of this link is to summarize and improve, return to life, and maintain children's interest in science. Scientific knowledge can be combined with life through the explanation of scientific pictures and video appreciation in life, so that children can find that science comes from life and is applied to life.