Kindergarten small class health activities Why is water dirty? Reflection after class

Academic analysis:

Water is the source of life. Without water, our life would be unimaginable. However, with the rapid growth of population, rapid development of industry and agriculture, and serious pollution of water resources, water shortages have become increasingly serious in many areas, and various diseases caused by water pollution have also brought suffering to people. Therefore, it is imperative to save water and protect water resources. However, students' understanding of water is limited to its great uses. They rarely understand the shortage of fresh water resources and the seriousness of water pollution. Therefore, environmental protection activities for water conservation and water protection should be carried out in primary schools to cultivate children's awareness of protecting water resources and protecting the environment from an early age. The development of this activity theme also has long-term benefits and will help improve the environmental awareness and quality of the entire nation. Textbook analysis:

The activities of this class are designed based on the "Course Standards" to "understand the important role of water in life, feel the close relationship between water and life, and stimulate the awareness of exploring water and protecting water" an activity.

Water is a substance that children are very familiar with and closely related to life. In the study and life of first grade, children have also accumulated a lot of knowledge about water. Therefore, carrying out scientific activities and environmental education activities around water are not only very interesting for children, but also easy to understand. It can also help them improve their knowledge and understanding, and further feel the relationship between man and nature, and man and society. Guide them to try a variety of methods to understand water, understand the important role of water in human life, feel the scarcity and preciousness of water resources in our country and even the world, and then consciously develop good habits of saving water and a preliminary awareness of caring for water resources.

Development and utilization of course resources:

This activity integrates the five units of "Our lives are inseparable from water" and "Protecting water and saving water" and designs activities The theme "Why Water Has Become Dirty" allows students to have a preliminary understanding of the current situation of my country's water resources, feel the scarcity and preciousness of water resources, and through investigation and analysis, explore the reasons why water has become dirty, form an awareness of caring about surrounding water resources, and save water. Environmental awareness of protecting water resources. ” Teaching objectives:

1. Understand the water resources and their current situation on the earth, and feel the scarcity and preciousness of water resources. 2. Students learn about the causes of water pollution by searching for information, exploring, and allowing students to Design various methods to protect water resources,

enable students to initially establish environmental awareness of saving water and protecting water resources. 3. Continue to cultivate students' group cooperative learning abilities.

Teaching preparation: courseware. , questionnaires, beakers, water samples, pictures and other materials. Teaching structure: 1 lesson teaching process: 1. Introduce conversation and stimulate interest.

Teacher: Children, look at what the teacher has brought to you. Show a glass of water) Student: water (then write on the blackboard: water)

Teacher: Can anyone briefly introduce what this glass of water looks like? Student: It has no color and no taste. Student: Water is transparent. Yes, it can still flow.

Teacher: Yes, water should be so clear and transparent. Where can we find it? Student 1: In the ocean and rivers. In streams and lakes.

Student 3: In ponds, on glaciers, and underground.

Teacher: It seems there is a lot of water around us! Is it as clean as this glass of water?

(The projector then shows the cup containing sewage)

Teacher: This is the water that a classmate took from the nearby river. Take a closer look, what does it look like? Student 1: It’s black!

Student 2: There is a thick layer of oil and dirt on the water. Teacher: Come and smell it. Student: It stinks!

Teacher: What do you want to ask when you see this water? Student 1: Why is the water dirty? How can we make this water clean?

Teacher: Good question! Let’s find out the answer together today.

(Immediately add a topic: Why did the water become dirty)

(Design intention: Through comparative observation, stimulate students’ interest and desire to explore the problem, give full play to students’ subjectivity, improve students’ interest in learning, and also reveal The goal of this activity.) 2. Group cooperation to explore the reasons why water becomes dirty 1. Exchange methods of collecting information

Teacher: Before class, the teacher asked everyone to group into our lives to find the answer. Have you found all the children? Okay, then

Let’s talk to you about what methods you have used? Student 1: My mother and I went to Southwest Bookstore to check out a lot of books. Student 2: I found a lot of pictures and text information on the Internet. Student 3: My father and I went to the river to take pictures of the water.

Student 4: I drew the small river near my home. Student 5: I took a cup of water from the river to observe.

Teacher: That’s great! You already know how to find information in various good ways. Then your gains must be great. Please share the collected information with the students in the group. I believe that as long as everyone works hard and cooperates together, we will be able to find out the reason why the water becomes dirty. 2. Group cooperation to explore the reasons

Teacher: Let us first recall, how do we usually conduct group cooperation and learning? Students can speak freely

(The courseware will then show the requirements for group cooperation learning) The teacher distributes the record cards

Teacher: I want to remind everyone to pay attention to the speeches of the students and give applause to those who have collected the information well. classmate, and record his good opinions

and finally select a team member to report the conclusions of your group on behalf of the group. The learning time is 10 minutes, now let’s compare to see which combination works best! Group cooperative learning begins! Students communicate and discuss in groups, and teachers provide guidance. Group A: The group leader is organizing the group members to speak.

Team leader: Ask student No. 1 to report the information you collected. The other students listen carefully and add any comments after listening. Student 1: I know from the book: The discharge of industrial wastewater and waste residue into the water is the main reason why the water becomes dirty. Student 2: I saw on TV that many people dumped garbage into the river, making it dirty and smelly!

Student 3: I saw on the Internet that many paper mills and fertilizer plants also discharge toxic sewage into the river. I also know that every year Beijing discharges 900 million tons of sewage into rivers, and 83 rivers in the city are polluted (show the downloaded picture information immediately).

Teacher: You guys found so much material at once, you are really capable! It will be clearer if you summarize these reasons into clauses!

The group leader leads the group members to organize their opinions.

Group B is having a discussion. Student 1: (shows a simple drawing he drew) This is a river near my home. Student 2, why did you draw the river water colorfully?

Student 1: Because the residents there poured all kinds of dirty water into the river, and there is a slaughterhouse here that discharges a lot of stench into the river every day

The stinking shit.

Student 3: What are these thick, black tubes used for? Student 2: It must be used by factories and residents to discharge sewage. Student 4: Write it down quickly!

The group leader records the speeches of the group members, and the teacher checks the recording. Group C is selecting outstanding representatives.

Student 1: I think the information Xiaolin found is very good. He found a lot of pictures from newspapers and the Internet, and he made the water dirty

The reason is very clear , so I chose him to speak.

Student 2: I think Xiaowen’s performance is also good, but his experiment cannot explain how the water becomes dirty. Student 3: I would also choose Xiao Lin. I think he uses his brain when speaking and speaks clearly.

Teacher: Teacher also believes in your choice! Now everyone cheers for Xiao Lin with applause! I hope Xiaolin can complete this task well

.

Then the team leader completed the record card.

(Design intention: The teacher seizes the appropriate opportunity to organize students to carry out group cooperative learning, gives students sufficient time, and provides effective guidance to the process of student group cooperation activities. Let students learn in a mutually respectful, democratic and harmonious manner. Learn from each other's strengths, experience the joy of success, and enhance self-confidence.) 3. After 10 minutes, report collectively. Group A report

Student 1: Our group believes that the water becomes dirty because factories randomly discharge wastewater, waste residue and toxic substances into the water. Student-student mutual evaluation:

Student A: I agree with your group’s view, but our group would like to add one more point: In fact, some of the water discharged from farmland has also been washed down by

rainwater Pesticides, fertilizers and all kinds of manure.

Sheng B: I would also like to add that some hospitals also throw used medicines and other waste into the water, which pollutes the water. Student 1: Thank you for your help. Group B report

Student 1: Our group believes that the water becomes dirty because residents continue to dump garbage into the water and the sewer sewage is discharged directly into the river

.

Mutual evaluation between teachers and students:

Student A: I agree with your group’s opinion. Our group also read from the Internet: Due to the arbitrary discharge of sewage, 0.33 billion tons of wastewater seeps into the underground aquifer in the western suburbs of Beijing every year.

Sheng B: I think the dirty water is also related to some accidents: Xiaojie in our group read in the newspaper that there used to be underwater oil pipelines

There were bursts, and some were filled with chemicals. The cargo ship carrying raw materials ran aground and capsized, and the oil and chemicals contaminated the water.

Teacher: I think your speeches are very convincing. Can any student sort out the opinions of these groups and explain what causes the dirty water? (Show cartoon)

Student 2: Water becomes dirty due to harmful substances in industrial wastewater and waste residues. Hospitals, domestic garbage, sewage, etc. are directly discharged into rivers

and farmland drainage , caused by pesticides and fertilizers flowing into the river.

Teacher comment: Just now, each of your children worked hard to cooperate and communicate with each other, and quickly found out the reason why the water became dirty, which also allowed the teacher to increase his knowledge. Thank you. you!