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Understand how to write lesson plans for fractions.
1, teaching material analysis: At first, the understanding of fractions was the mathematical content in the first volume of the third grade of the new curriculum. It is students' initial understanding of scores on the basis of mastering some integer knowledge. Fraction is very different from integer, which is an extension of the concept of numbers. This part of the content is taught on the basis of students mastering integers within 10 thousand, which is the beginning and core of this unit and plays a vital role in future study.

2. The teaching objectives of this class are: to experience the average score; A little knowledge and understanding, a little reading and writing. The fractional size of the comparative molecule is 1. Cultivate students' language expression ability. In the hands-on operation, observation and comparison, students' mathematical autonomous learning ability and mathematical thinking ability are cultivated.

3, teaching focus: a little initial understanding, reading and writing.

4. Teaching emphasis: Molecules can be compared with the score of 1.

5, teaching process: through the understanding of "half", understand the meaning of "half", say how much is half? Tell me how to divide it in half. Divide into two equal parts, one of which is half.

6, hands-on operation, understand a quarter.

7, analogy association, abstract generalization.

8. Practice to improve your ability.