First of all, talk about textbooks.
"Nutrition should be balanced" is the third lesson of Unit 3 "Food" in the second volume of the fourth grade of Science, a science and education edition. It is based on students' statistics on the food they eat in a day and their understanding of the nutrients contained in the food. It is a comprehensive application of the contents learned in the first two classes, which has an important guiding role for students to reflect on their eating habits and gradually form a healthy lifestyle in the future. In this lesson, students should be guided to compare their daily food collocation with the scientific "pagoda", so as to gradually understand the significance of nutritional balance, initially learn dietary nutrition collocation and formulate their own dietary nutrition principles, and establish the consciousness of healthy life. The whole class is divided into two parts:
1, the standard of nutritional balance;
2, with dietary nutrition.
Second, the analysis of learning situation
With the continuous improvement of living standards, especially the life of the only child is more superior. Most of them don't care about all kinds of nutrients needed by the human body. They like to eat, but if they don't like it, they don't eat. There is a general lack of understanding of food processing; Not paying enough attention to the need to eat "balanced nutritious food"; I don't know enough about how to eat "balanced nutritious food". Therefore, overnutrition and malnutrition often occur. Through the study of this lesson, students realize that every food can't contain all the nutrients, and then transition to a balanced nutrition for our normal life and growth.
Third, talk about teaching objectives.
Combining the reality of the fourth-grade students and following the spirit of curriculum standards, I have determined the teaching objectives:
1, scientific concept
Initially, no food contains all the nutrients needed by the human body, so we need to match the diet to ensure adequate nutrition. With dietary nutrition, it is necessary to have both varieties and a reasonable quantity.
2. Process and method
Get useful information through reading materials, and form an understanding through your own analysis and collective discussion.
3. Emotional attitudes and values
On the basis of understanding a balanced diet, establish the awareness of healthy living. Through the analysis and research of balanced diet, I feel the importance of rational thinking.
Fourth, the focus of teaching
Explore and understand the food "pagoda" structure diagram, learn to match food reasonably, and let students know that only by taking balanced nutrition can they ensure their health.
Difficulties in teaching verbs (abbreviation of verb)
Learn to reasonably match dietary nutrition and enhance the awareness of healthy living.
Sixth, teaching preparation.
Courseware, food pictures, balanced diet pagoda information, etc.
Seven. teaching process
(A) create a situation to stimulate interest
As the saying goes, food is the most important thing for people. Today, the teacher brought many pictures of food. Do you want to see them? What do you have? The teacher is drooling over all kinds of delicious food. What do you like best among so many foods? Why?
Students think and answer.
The teacher concluded: It seems that when students choose food, sometimes it is because of hobbies, and sometimes it is because it contains nutrition, right? Food is rich in nutrition, which can be divided into protein, sugar, fat, vitamins, minerals and water, and each has its own function.
Who can tell me what their respective functions are? (Students express their opinions) The big screen shows their roles. Teacher: We only need one nutrient, OK? (No) Every nutrient has its own function, and every nutrient is needed. What should I do if I want to take in a variety of nutrients?
Health: (Raise your hand to speak)
Teacher: What should I do if I eat too much? Why? What if you eat too little? (Neither is good) We should pay attention to science when we take in nutrition. In order to eat healthier and more scientifically, we should match food reasonably, which is what we are going to discuss today-balanced nutrition. (blackboard writing: nutrition should be balanced)
(2) Explore new knowledge
1, food classification
According to the main content of nutrients, foods are divided into five categories. (Screen display: whole grains, fruits and vegetables, meat and eggs, milk and beans and their products, oils and fats) Students read together. What kind of food do we eat most often? Which one eats the least? Students answer according to their living habits.
2. Build your own food pagoda
According to the eating habits in life, build these five foods into a food pagoda. Would you like to have a try? (Thinking) Now let's look at the shape of this gourmet pagoda. Take a closer look. What did you find? (Default: each floor contains different food, the largest floor contains the food we eat the most, and the smallest floor contains the food we eat the least; The pagoda is divided into five floors, and the first to fifth floors are getting smaller and smaller. )
Teacher: Let the students take out their food pagodas and fill them in. (About 2 minutes) Teacher: Please report. What is the result of your filling? Why do you want to fill it out like this? Name the students to report.
Teacher: I'll ask my classmates to answer again. Other students should listen. What did you find from their answers? Health: (default: everyone on the top floor is fat)
Teacher: It seems that people usually eat the least oil, so they put it on the fifth floor. So are all other floors the same? (different)
3, the standard of balanced nutrition
It seems that students have some differences in other foods. According to the eating habits of Chinese people, the Nutrition Society of China has specially formulated a healthy nutrition pagoda. Look at the big screen What is this?
Health: First floor, whole grains. On the second floor, fruits and vegetables. The third layer, meat and eggs. The fourth layer, milk and beans and their products. The fifth layer, grease.
Reflections on balanced nutrition teaching
Layer by layer analysis.
Teacher: Compare your food pagoda with the scientific food pagoda. Do you think your diet is scientific? What do you think you should pay attention to in your diet?
Students answer according to what they have learned.
Teacher: Through the comparison just now, the students all found some unscientific places in their diet, so they should improve when they go back. Who said that? What do you think can make our nutrition more comprehensive and balanced through the research just now?
Teacher: Please answer (1) what kind of food can provide energy? (Whole grains) (2) What kind of food can support our growth and development? (Meat and eggs) (3) What kind of food keeps us healthy? (Vegetables and fruits) So what are the characteristics of our three meals a day? Why did you eat well in the morning?
(C) knowledge internalization, extracurricular extension
(1) Evaluate a classmate's lunch.
Well, let's see. Now the teacher provides everyone with the lunch of the little classmates. Please comment. What do you think of his lunch? Science?
Students evaluate according to what they have learned before.
(2) Design a dinner
Teacher, here is another recipe. Design a nutritious dinner with what we have learned today. Is it okay? Ok, so before designing, let's look at the requirements first. What are our standards?
The student group designs the dinner that everyone likes according to the requirements.
Report and communicate.
(4) Summary
Every meal should pay attention to balanced nutrition, not too fat or too thin, and have a healthy body.
What did you gain from today's study?
Eight, blackboard design
3. Nutrition should be balanced
Meat and vegetable collocation
Eat more fruits and vegetables.
not a picky eater