Third Grade Math Book Perimeter Teaching Video

The video for teaching perimeter in third grade math is as follows:Web Link.

The main focus of teaching perimeter in third grade math is for students to understand the concept of perimeter and to be able to calculate the perimeter of a figure.

Introducing the new lesson: By letting students observe the surface of an object or the shape of a plane figure, they are guided to recognize the concept of perimeter.

Investigating new knowledge: through concrete examples and activities, students will explore how to calculate the perimeter of shapes.

Consolidating new knowledge: Through exercises and activities, students will consolidate their understanding of the concept of perimeter and how to calculate it.

Expanding and Extending: by letting students explore how to calculate the perimeter of combined shapes, expanding their thinking and problem-solving skills.

In the teaching of perimeter, attention needs to be paid

Emphasize the understanding of the concept of perimeter, so that students can understand the definition of perimeter and how to calculate it.

Emphasize the students' subjective position, let the students explore and cooperate and communicate independently, and cultivate their independent learning ability.

Emphasize the arrangement of exercises and activities so that students can consolidate what they have learned through practical operation.

Emphasize the extension of the extension, so that students can explore the calculation of the perimeter of the combination of shapes, to develop their thinking and problem-solving skills.

Area and Perimeter

If the triangle with the same area, the perimeter of an equilateral triangle is the shortest; if the quadrilateral with the same area, the perimeter of a square is the shortest; if the pentagon with the same area, the perimeter of a square-pentagon is the shortest; if any polygon with the same area, the perimeter of a square is the shortest. The perimeter of a square is the shortest. Perimeter can only be used for two-dimensional shapes (planes, surfaces), three-dimensional shapes (three-dimensional) such as columns, cones, spheres, etc. can not be expressed in terms of perimeter of the size of their boundaries, but to use the total surface area.

Content standards

"Perimeter of the understanding" is the first period of compulsory education in mathematics, grade 3 (first book) of the content of learning, the curriculum standards on the "perimeter of the understanding" learning The content of the curriculum standard on the "perimeter" learning, in fact, contains three levels: first of all, let the students realize the concept of perimeter, and can experience perimeter in real life; secondly, let the students master the method and process of measuring perimeter; finally, experience and feel the application of mathematics in life.