North Normal University Edition third grade "what is the perimeter" teaching reflection

The teaching of "What is perimeter" follows the new concept of curriculum reform, using hands-on, cooperative communication, independent inquiry, providing students with sufficient time and space for learning. Teachers' teaching philosophy, teaching awareness, teaching ideas, teaching implementation are based on the future development of students. This lesson highlights the following characteristics:

Subject What is perimeter?

Teaching content to recognize the perimeter

Teaching objectives

1, combined with specific things or shapes, through observation, operation and other activities, to recognize the perimeter.

2, can measure and calculate the perimeter of triangles, parallelograms, trapezoids and other shapes.

3, combined with specific situations, perceive the perimeter and the close connection between real life.

The key points

Through observation, operation and other activities, to recognize the perimeter. Initial experience of the meaning of perimeter.

Teaching preparation leaves, wool.

The teaching process

I. Recognize the perimeter.

1, please students with a stroke the shape of a leaf you are familiar with.

2, ask students to report: you drew those beautiful leaves?

3, do you have a way to come up with the length of that leaf? Please try.

Ask students to measure a leaf individually or in groups.

4. Ask students to report their measurements and results.

5. Definition: perimeter: the length of a week of a figure is called the perimeter of the figure.

2. Measure and calculate the perimeter of a figure.

1, discussion: to get the perimeter of these shapes, how many sides need to be measured? Why?

2, student activities .

3, report the results.

3. Are the perimeters of the two figures in each problem the same? Why?

1, guide students to observe carefully, by measuring, moving and other methods, make a judgment.

2. Discuss and exchange in small groups.

Four, teaching reflections

1. Contact with the actual life of learning math.

This lesson to students familiar with the life material as a carrier. At the beginning of the new lesson and create a small ants around the edge of the leaves crawling around the situation, find the perimeter of the objects around the activities, from a variety of perspectives to allow students to establish the "one week" of the spatial concepts. The teaching content closely related to children's lives is designed in accordance with children's cognitive characteristics, hobbies and psychological characteristics, so that students can realize that mathematics comes from life and there is mathematics everywhere in life. In particular, by allowing students to trace the circumference of a leaf and measure the circumference of a circle, students are able to grasp mathematical knowledge and develop an interest in learning mathematics in the activities that interest them the most.

2. Creating a learning atmosphere of "independence, cooperation and inquiry".

The way of teaching really changed the traditional teaching by the teacher to raise questions, named individual students to answer, the phenomenon of the teacher leading the students to go. For students to provide a broad space for independent learning, fully respect the status of the main body of student learning. At the beginning of the new course to create a variety of situations, not only for the students to provide independent thinking opportunities, but also provides opportunities for cooperation and exchange, so that they learn from each other in the activities of cooperation and exchange, to develop a sense of cooperation and the ability to explore. Students learn in such an atmosphere, learn easily and happily, and actively.

3, highlighting the process and method of guidance.

"Not only the results, but also the process" is another new idea of the curriculum standards. I introduced the concept of "perimeter", not prematurely give what is the perimeter, but let the students through the eyes, mouth, hands, brain multi-sensory activities, and gradually recognize the meaning of "perimeter". Each point of knowledge is to allow students to personally participate in the study, personally to experience, personally to experience, fully experience the process of knowledge formation.