Teaching objectives

1. Through the game of building block competition, we can observe the three-dimensional figure composed of five small cubes from three different positions, correctly identify and draw the corresponding figure, and develop the concept of space.

2. A three-dimensional figure consisting of five small cubes seen from two different positions according to the specified figure.

The key point is to correctly identify and draw the shapes of a group of three-dimensional graphics viewed from the front, side and above. difficulty

You can see it in different positions according to the specified figure, and build a three-dimensional figure with several small cubes.

Student activities

I. Activities 1

1, the teacher shows the theme map or asks the students to turn over 60 pages of textbooks and say what you know from the map.

Teacher: Today, our class also organized two building block competitions. (written on the blackboard)

Teacher: the first item is: build a three-dimensional figure with five small cubes.

Let the students draw from the top, front and left directions respectively. You got it? By comparison, which table scored the most?

3. Teacher: First of all, the deskmate cooperated with five small cube learning tools to show the three-dimensional graphics on page 60 of the textbook, and said: Set the three-dimensional graphics exactly like the teacher, and then let each student draw the shapes from the top, front and left (blackboard) respectively, and fill them directly in the box on page 60 of the textbook, which is the fastest.

4, the whole class evaluation, modification, communication