Seek the teaching plan of "observing objects" in the eighth lesson of the first volume of mathematics in the third grade of primary school!

[2007- 1- 18 12:20:00

Teaching plan for observing objects

Teaching objectives

Knowledge and skills

Let the students know that the shapes seen from different angles are different by observing the physical objects. Cultivate students' spatial similarity ability and develop spatial concepts.

Mathematical thinking

Experience the activity of observing the shape of objects from different positions and understand the relationship between parts and the whole.

problem solving

Can recognize the shapes of simple objects observed from different positions.

Emotional attitude

Stimulate students' interest in learning mathematics, cultivate students' sense of cooperation and experience the connection between mathematics and life.

focus

In the actual observation activities, I feel that the shapes of objects observed in different positions are different.

difficulty

Correctly recognize the shapes of objects observed from different sides (left and right).

Activity flow chart

Content and purpose of the activity

Activity 1: Observe the object and find the picture.

Activity 2: Judge the camera angle according to the photos.

Understand that when you look at an object from different angles, sometimes you will see different scenes.

Problems and situations

Teacher-student behavior

Design intent

(Activity 1)

The story of drawing carambola: One day, the art teacher brought carambola for everyone to observe carefully and draw it. Naughty also drew one. The students laughed at him and said: this is not a carambola, it is a five-pointed star!

The teacher went over and took a look. Not only did he not criticize naughty, but he also praised his careful observation. Students, do you know why? Seen from both ends of the carambola, it looks like a five-pointed star.

Carambola sees different things from different angles, so do other objects see different things from different angles? Today we will learn together: observing objects.

(1) Look for photos: There are four Chinese books and some photos on each group's desk. Four students are sitting in different positions. Please observe carefully from your position, and then find out the images you observe from these pictures and put them in front of you.

(2) Report: Ask a small group of students to report on stage.

Tell me where you are sitting first, and then tell me which side of the Chinese book you saw and which photo you chose.

These two photos are both side views. Is there any difference between these two profiles?

(3) Discussion: The teacher has a picture here (taken from the above picture). Let's discuss from which angle it was taken. Which of the four students stood up and saw the same picture?

(4) Ask the team leader to collect the books and photos in the drawer.

Let the students know that the shapes seen from different angles are different by observing the physical objects. Cultivate students' spatial similarity ability and develop spatial concepts.

(activity 2)

The teacher took some photos of a classmate in our class. Let's see who it is. Please bring this classmate out. Please guess from which angle these photos were taken. Please come up and stand in the corresponding position.

Show me the front and back first. After the third student went to the stage to find a position, he asked the following students: Is he looking for the right position? How do you judge?

Show the fourth photo and ask: This is also a profile photo. Was it taken at the same angle as the third one? what do you think?

(2) Xiaoming and others are also taking pictures of small animals. Let's go and have a look! Book: 67 pages, for example 1.

Three people took pictures of the little dinosaur from three different angles. Who took the following three pictures? Please write the name of the little photographer under the photo.

Which side of the little dinosaur was this photo taken? Who took it?

(3) After taking pictures of small animals, they are attracted by the van outside the door.

Three people observed the truck from three different angles. What does the truck look like in their eyes? Please contact the corresponding picture below. Book 70 pages, complete the first question.

Put the book away after the projection is corrected. Consolidation exercise

(1) Put the concrete object in the right direction according to the photo:

These animals are so cute that the teacher can't help taking some pictures of animal toys. There are four photos in each group of white envelopes, which were taken by Mr. Wang from positions 1, 2, 3 and 4 respectively. Ask the team leader to send it to the corresponding team members according to the serial number on the back of the photo. Then please put the doll in the correct position according to the picture in your hand, and make sure that after the doll is put away, what each student observes is the same as that in the picture.

Stimulate students' interest in learning mathematics, cultivate students' sense of cooperation and experience the connection between mathematics and life.

(2) Look at it from another angle: Do you want to look at the doll from another angle? Then let's play the game of finding seats. Let the group leader combine these four photos and send them to everyone at will, and then let everyone find a suitable place to sit down according to the photos sent by the group leader. Need to pay attention to three points: 1 wash. The doll can't move; 2. Can't look at the digital tips on the back of the photo; Find your hand and kneel on the ground. See which group is faster, right, good.