Students have accumulated direct experience in the first volume of senior one, and have a certain understanding of long and short. As a preparatory course before the formal study of length units, the purpose of this course is to measure the classroom length through self-selected units, experience the "quantity" in "quantity", express and exchange the measurement results in a certain way, accumulate the experience of measurement activities, and lay the foundation for subsequent study.

Design concept:

The experience of mathematics activities needs to be accumulated in the process of "doing" and "thinking", which is gradually accumulated in the process of mathematics learning activities. The age and cognitive characteristics of junior two students determine that students often need some external activities to help them understand mathematics. This course runs through three questions, creating space for students to think and operate, and providing opportunities for experience, experience and accumulation of direct experience.

Teaching objectives:

1. Experience the process of measuring classroom length in different ways, and realize the diversity of measurement methods and tools.

2. Accumulate the experience of measurement activities and cultivate the awareness and ability of measurement.

3. Experience the fun of cooperation, communication and success in measurement activities.

Teaching emphases and difficulties:

Emphasis: accumulate experience in measurement activities and cultivate measurement consciousness and ability.

Difficulties: To cultivate students' ability of cooperation, mutual assistance and communication in measurement activities.

Class arrangement:

1 class hour

Teaching preparation

Measuring tools, cubes, jars

Teaching process:

First,? Create situations and introduce topics.

Teacher: Students, it will be New Year's Day in another month. On New Year's Day, our class will hold a get-together. The teacher wants to buy some flowers to decorate the classroom, but I don't know how long it is. Can you help the teacher measure the length of the classroom? (Leading topic: How long is the classroom)