Teaching target: fourth-grade students

Teaching content: making tea in mathematics.

Teaching objectives: Through the study of this course, students can understand the basic methods of making tea, master the time and proportion of making tea, and improve their ability to solve problems in mathematics.

Teaching emphasis: master the time and proportion of making tea;

Teaching difficulties: cultivating students' thinking ability and problem-solving ability;

Teaching methods: explanation, demonstration, practice and practice.

Teaching preparation: tea, tea set, hot water, form paper, pencil and eraser.

Teaching process:

First, introduce new knowledge to stimulate students to think

The teacher took out a cup and demonstrated the method of making tea. Then ask the students, how long does it take to make tea? How much tea do you need? What is the ratio of water to tea? Listen to the students' answers and make them think. How long does it take to make a few cups of tea? How much tea? What is the ratio of water to tea?

Second, start teaching.

1. Three-line summation method

The teacher shows the data of nine times of making tea and the proportion of tea on the blackboard for students to observe.

Then the teacher uses the three-line summation method to help the students find out the methods and formulas of total time, total tea and average time and average tea, and let the students tell the calculation results.

2. Practical operation

The teacher put tea, hot water and tea set in front of the students, and asked them to make their own tea according to the ratio just calculated. The teacher observes the process of students making tea and corrects students' mistakes in time.

Third, consolidate the practice.

1. Partnership opening

According to the data of making tea nine times in the table and the proportion of tea, let the students discuss in groups and find out the total time, total tea and average time and average tea.

2. Personal practice

The teacher wrote the questions on paper and asked the students to answer questions such as how many minutes to soak, how much tea to use and how many cups of tea to drink at most.

Teaching reflection:

Through practical operation, this class allows students to experience the process of making tea, deeply understand the relationship between time and proportion, and improve their ability to solve problems in mathematics. In the teaching process, I found that students have a good understanding of the problem of making tea, and also mastered the relationship between the time and proportion of making tea. However, oral calculation is difficult, and some students make mistakes in the calculation process, so they may need to strengthen training. In the next teaching, I will pay more attention to the time of practice, so that students can cultivate their oral expression ability.