moving target
1. Cultivate children's interest in calculation and the accuracy and agility of thinking through various sensory training.
2. Improve the ability of logical reasoning and form a good habit of doing things in an orderly way.
Activity analysis
The classroom discussion activities of Nature Survey mainly focus on what kind of teaching strategies teachers adopt, how to give full play to teachers' "leading" and children's "main role", and how children in large classes respond to the content of mathematics and their interest in learning.
We know that natural measurement refers to the use of common natural objects around us, such as paper clips, footsteps, chalk and so on. As a measuring tool for direct measurement, this is only the measurement of common tools around us, not the measurement of standard tools such as straightedge and straightedge. It includes measuring the length, height, thickness and weight of an object.
Children's learning of mathematical knowledge and mastery of skills need to be practiced many times before they can get it. Children's interest in mathematics activities and the cultivation of good study habits also need to be cultivated in colorful activities. I designed the activity of "natural measurement" (this activity is based on the measurement of object length), trying to let each child explore the method of natural measurement in his own operation process, thus fully embodying that children are the main body of learning, and teachers act as supporters, guides and organizers in this activity.
Activity flow:
(1) Import activities.
1. Organize children's games: My plane is about to fly, and I am familiar with the place names all over the country (freely standing on the outline of China map).
2, combined with visual inspection, compare who is far from Beijing in each city.
(2) learning natural measurement.
1. In the name of "Geological Surveyor", please ask the children to try to measure with color straws.
2. Children communicate their own measurement methods and guide them to discuss the correct measurement methods: when measuring, the measuring tool should be aimed at the starting point, and the other end of the measuring tool should be marked with chalk or hands. When measuring for the second time, the measurement should be started from the mark.
3, combined with the table 1, the teacher explained the method of recording.
4. The two children choose the measuring line to measure together, and the teacher observes and gives timely guidance.
5. Ask some children to talk about the measurement results.
(3) Experience the relationship between measuring tool length and measurement results.
1, the teacher asked: "The teacher also has two measuring tools, bamboo sticks and building blocks. Can you measure the route with these two materials? See what secrets you find? " (At the same time, let the children guess how to use Form 2. )
2. The child will operate again and form a record for the teacher to guide.
3. The children exchange the calculation results and present the results on the blackboard.
(4) Extension of activities:
Show me wool and explain how to measure it with wool. -Straightening the rope requires cooperation; Show chopsticks and other operating materials (you can't just complete the measurement)-learn a new' recording method'.
Activity reflection:
1, pay attention to the cooperation between children. Through the cooperative measurement of children, the effect of classroom teaching can be effectively improved, which not only conforms to the age characteristics of large class children, but also ensures the complementarity and cooperation of children's mutual learning.
2. Pay attention to the integration of various fields. The study of the theme activity "I love my motherland" can be organically combined with mathematics activities. On the one hand, let children know the corresponding positions of major regions on the map, on the other hand, they can clearly measure the distance between cities (the design of the map is basically completed in proportion, and the selected cities are typical).