Rainbow is Lesson 4, Unit 2, Volume 1, Grade 5, Primary School Science. Through the study of this lesson, students can cultivate their observation ability and practical ability. Cultivate students' ability to solve problems through various methods.
Disadvantages of teaching
1. The pictures collected by the teacher are not effective, which affects the students' judgment.
2. When exploring the causes of rainbow formation, there are some feelings imposed on children. If you can sum up this link after the child finishes the experiment, the effect will be better.
Students should demonstrate the rainbow in the report after making it, so that other children can know more about how to make it.
Advantages of teaching
1, make full preparations before class. In this lesson, we used two parts of the textbook: the first part is the self-made water prism. Part II: Making Newton's disk. Students are required to prepare in advance: bring their own small mirrors, white cardboard, 7-color cardboard, scissors and pencils. The teacher prepared in advance: prism, sink and sprayer. Therefore, students' preparations for experimental activities are well done.
2, the teaching process from easy to difficult, step by step. In the teaching process of this lesson, let students observe the experiment of splitting sunlight with prism first. The first activity is to let students make their own water prisms to see if they can form a rainbow. The second activity is to let students make Newton's disk. Through group discussion and class discussion, students initially observed that three to seven colored cardboard (red, orange, yellow, green, blue, indigo and purple) were combined into a Newton's disk in turn.
3. Carry out design experiment exploration activities to cultivate students' scientific literacy.