Analysis of learning situation

1, personality differences:

The third grade students in primary school are the key period to form self-confidence. They can find their own value by accepting others' evaluation, and generate excitement, pride and confidence in themselves; Some also show strong autonomy, self-assertion, high self-evaluation, and sometimes even "supercilious", which easily leads to conceit. On the contrary, some children are discriminated against by their classmates because of poor grades or lack of certain aspects, so they often underestimate themselves and lose confidence in themselves.

2. Emotional instability:

Due to the lack of life experience, junior high school students are prone to nervous mood, poor self-regulation ability, difficult to release psychological pressure and easy to worsen their mood in unfamiliar, serious, conflict, terror, restraint and accusation situations. They like to play games and study with their partners, but their emotions are unstable, excitable and impulsive. They often blush with shame because of a little thing, and their emotions change greatly and are exposed. Most of them can be seen on the face.

3, self-control is not strong:

From the third grade, when students enter adolescence, they will have a strong desire to be independent and get rid of adult control, so their personality characteristics will also show obvious independence. At the same time, with the growth of age, their dependence on external control gradually decreases, but their internal self-control ability has not yet developed, and they cannot effectively regulate and control their daily behavior.

Teaching objectives:

1, Know the target: Know the meaning of perimeter and establish the concept of perimeter.

2. Ability goal: Combine specific things or figures, and know the surroundings through activities such as observation and operation. Can initially measure the perimeter of triangles, quadrangles and other graphics.

3. Emotional goal: Stimulate students' interest in learning through demonstration operation, cultivate students' habit of observation and thinking, and enable students to achieve the purpose of autonomous learning, participation in learning and cooperative learning.

4. Innovation goal: On the basis of students' full participation in the learning process, cultivate and develop students' multi-directional thinking, and encourage students to measure and calculate the perimeter of graphics in various ways.

Emphasis and difficulty in teaching: knowing the perimeter, understanding the meaning of perimeter and developing the concept of space.