Teaching content: Example 1 on pages 38 and 39 of the textbook, Example 2, "Doing One", Exercise 8, Question Type 1-3.

Teaching objectives:

Knowledge and skills

(1) Let the students know the angle and know the names of each part of the angle.

(2) Learn to draw angles with a ruler.

Process and method

Through observation, operation and other teaching activities, we can cultivate students' observation ability, practical ability and abstract ability, establish a preliminary concept of space, and develop students' thinking in images.

Emotional attitudes and values

Through practical activities, students can gain a successful experience, build self-confidence and feel that mathematics is everywhere in life.

Teaching emphases and difficulties:

Identify angles according to their characteristics.

Teaching methods and learning methods:

Teaching method: try to guide the method.

Learning method: independent inquiry method.

Teaching preparation:

1 scissors, 1 triangular ruler, 1 blank paper; Rulers, objects of various shapes; Rectangular, square, round white paper 7 pieces each; 12; Some pushpins.

Teaching steps:

First, life introduction, revealing the topic

(1) Perceive the angle in life.

① Courseware display items (scissors, clock face, triangular ruler).

② Find out where the angles in the above objects are, and guide the students to draw the angles.

(3) Find a corner of life.

(2) Reveal the topic.

Through exploration, I know that horns can be seen everywhere in life. Today, we are going to see Jiao. (blackboard writing: a preliminary understanding of the angle)

Second, practice perception and establish representation.

(1) painting scissors.

Students choose tools to draw corners and cut them out.

Collective communication.

(2) Characteristics of touching and exploring angles.

(3) Close your eyes and imagine the angle. You can also compare pictures in the way you like.

Third, the operation, consolidation and application of activities.

(1) Look for it.

① Make clear the activity requirements: look for an angular figure in the school box without eyes.

(2) Feedback touch graphics.

③ Group communication. Where are the corners of each figure?

④ Feedback with gestures.

(2) do it.

① Explain the activity requirements.

② Students choose their favorite learning methods to start activities.

③ Organize students to visit the works.

④ Students' questioning and evaluation.

Fourth, summarize and improve.

(1) Summary: Today we met a new friend-Jiao. What do you know about it?

(2) Extension: What else do you want to know about the angle?