1 Big class teaching plan "Watermelon Insect" Activity goal:
1. Learn to observe watermelon worms with a magnifying glass and feel the main appearance characteristics and living habits of watermelon worms.
2. Interested in exploring bugs.
Activity preparation:
Magnifier, drawing paper, pen, several transparent plastic bottles.
Activity flow:
1. Talking about watermelon worms.
1. Teacher shows pictures of watermelon worms and leads to the topic:
"Do you know watermelon worms?" "Do you know anything interesting about watermelon worms?" Do you know where watermelon worms like to live?
2. Discuss how to catch watermelon worms.
1. Teacher: "Where are the watermelon worms in the kindergarten? Where can I catch watermelon worms?
2. Teacher: "What tools do you need to catch watermelon worms? What should I pay attention to when catching watermelon worms?
Children can look for watermelon worms freely in the garden.
The teacher encourages the children to find watermelon worms together, and reminds them to combine when they hear the signal.
4. Exchange experiences in catching watermelon worms.
1. Teacher "Did you find the watermelon worm? How did you find out? Where did you find it?
2. Teacher's summary: Watermelon insects like to live in dark and humid places.
5. Observe watermelon worms and communicate with them
1. Guide children to observe watermelon worms with a magnifying glass.
Teacher: "Watermelon worm is so small, can we see it clearly?" What tools can be used to see clearly?
2. Guide children to observe freely "What did you find?"
3. The teacher led the children to observe freely "What is on the head of watermelon worm? What is it like? What is the body of watermelon worm? Teachers can make children speak freely.
6. Guide children to draw watermelon worms and record their own observations.
Teacher: "Watermelon insects play with us today. Let's draw a picture for this little guest! " !
Activity reflection:
Let them know its shape, characteristics and living habits, and let them know that the soil has many nutrients, which is the basis for the survival of many animals and plants. In the activities, children are willing to discover and take the initiative to participate in scientific activities, and learn to observe and compare with various senses. The children are full of fun to explore this activity.
Paying attention to children's interests and needs, children's experience is also reflected in teaching activities. According to the actual situation of the children in this class, it reflects the suitability and personalization of teaching objectives. According to the reality of children in this class, on the basis of studying and mastering the actual level, development needs and possibilities of children in this class, the potential, direction and pace of children's further development are determined. At the same time, teachers pay attention to the core values in this field and give children the best learning and living environment.
When a group of boys were organizing outdoor activities, they found several black and gray bugs on the lawn, which curled up into a small watermelon at the touch. In this regard, children have raised many questions, and "watermelon worm" has become a hot spot they pay attention to every day. Natural curiosity and love for insects just give children an opportunity for scientific enlightenment education.
Activity 1 the name of a bug.
(1) activity target
1. Observe the appearance characteristics of insects and use your imagination to give them a dangerous name.
2. Learn the preliminary investigation and be able to tell the results of the investigation.
3. Stimulate interest in insects.
(2) Activity process and record
1, activity flow:
(1) Observe the bug and name it.
(2) Investigation of scientific names and common names.
(3) orally report the name of the bug.
2. Activity record:
(1) The teacher provides a magnifying glass in time to guide the children to observe and distinguish. Children put bugs in their hands and observe and tease them with magnifying glasses. Debate fiercely about its name:
"Move, it becomes a ball, like an earth, called a worm";
"No, like a ball, it's called coccidia";
"There are seven kinds of patterns on the body, called seven-striped worms";
"With fourteen legs, it should be called a multi-legged worm";
"It looks like a small watermelon. Call it watermelon worm. " ...
After discussion, the children reached a consensus and called it "watermelon worm" temporarily.
(2) Teachers guide children to investigate the scientific and common names of watermelon worms. When entering and leaving the garden, the children invited their parents to the kindergarten to observe watermelon worms, and asked grandpa, grandma, dad and mom for scientific and common names.
On Sunday, I asked my parents to accompany me to Xinhua Bookstore, Library and Internet to find information about watermelon worms.
(3) Teachers encourage children to actively express their opinions orally.
Yuan Jinhao said, "Grandma doesn't call it watermelon worm, but' clothing caterpillar' because it grows in rotten grass and Mao Mao. Liu, who lives in the northeast, said, "This is called tide bug, and my mother is called wet bug. "
I looked up a lot of information about the scientific name of watermelon insect, but I didn't find it.
3. Extended content:
(1) Find out why watermelon worms turn into watermelons, and let the children discuss the characteristics of watermelon worms-suspended animation.
(2) Interview why watermelon worms are called wet worms, and let children explore the living habits of watermelon worms-living environment.
(c) reflective activities
In the activity of naming watermelon worms, teachers should give children full opportunities to observe and express. Children have a preliminary understanding of the shape of watermelon worms, and at the same time have a new question-why watermelon worms become watermelons and why they are also called wet worms. Teachers should list problems in time, stimulate children's interest in inquiry, and enrich and diversify children's activities.
Small knowledge
Why do watermelon worms become watermelons?
If you find a watermelon worm, it will curl up with a little movement, which is very interesting. This phenomenon is called suspended animation of insects.
Feign death is a way for insects to avoid enemy harm, and it is the self-protection of watermelon insects! -refer to "100,000 Why"
Activity 2 Home of Watermelon Worm
(1) activity target
L, by looking for the home of watermelon worms, understand their living environment.
2. Stimulate children's interest in exploration.
(2) Activity process and record
1, activity flow:
(1) Looking for the home of watermelon worms.
(2) Feed watermelon worms.
(3) Small experiment: Save watermelon worms.
(4) Establish a new home for watermelon worms.
2. Activity record:
(1) Teachers provide sticks, bottles and jars to guide children to find watermelon worms. The children found many watermelon worms in the gap between the cement wall and the lawn, but few on the lawn. Some children came to ask me why. Teachers should guide children to discover and explore by themselves.
(2) Children dig watermelon worms and put them in big bowls and small glass bottles. After a few days, some watermelon worms in the big bowl could not move, while those in the small bottle climbed happily. Teachers guide children to observe and smell the sand in two different vessels, and encourage them to tell the comparison results: the sand in the bowl is dry and the sand in the bottle is wet. -Watermelon worms were killed by the sun. Then the teacher guides the children to recall the reasons why there are many gaps and few lawns when catching insects, and encourages them to consult information, consult their parents and exchange results with each other.
(3) The teacher instructed the children to do experiments-how to save the watermelon worms in the bowl. Some children put biscuits, chocolates and other foods into the bowl, and some children pour water into the bowl. It was found that watermelon worms did not die after pouring water. The teacher led the children to conclude that the living environment of watermelon worms is a dark and humid place.
(4) Teachers encourage children to use their imagination to design new homes for watermelon worms.
Little knowledge-watermelon worm
Watermelon is a multi-legged insect, and its body is divided into two parts: head and stem. There are a pair of tentacles in the head and a few in one eye. The displacement stem is flat and long, with many nodes, and each node has a pair of feet for crawling. The respiratory organ is trachea, which lives in moist, loose and organic-rich soil.
Why are watermelon worms sunburned to death?
There is a thin layer of colloid outside the epidermis of watermelon worm, the thickness of which is not more than one thousandth of a millimeter, which plays an important role in preventing evaporation of water in the body. Watermelon worms are most afraid of losing water. If they lose too much water, they will die. Therefore, the watermelon worm living in the soil, the friction between the epidermis and the soil destroys the colloidal layer, so when it is exposed to the sun, the water will quickly evaporate from its body, and it cannot survive. -refer to "100,000 Why"
Activity 3 Reproduce Watermelon
(1) activity target
1. You can express your understanding of watermelon worms naturally and truly in various ways.
2. Share new experiences with each other.
(2) Activity process and record
1, activity flow:
(1) Create and display children's songs, stories and songs about watermelon worms.
(2) Masons paint: watermelon worms.
(3) Game: Watermelon worm changes.
2. Activity record:
(1) Children's songs compiled by teachers and children: watermelon is long, watermelon is round, and watermelon climbs into the hole. The riddle is as follows: there is a bug, wearing a black coat, which turns into a small watermelon when it is in danger. Please guess what its name is.
(2) Children made watermelon worms of different sizes and shapes with potatoes, sweet potatoes and plasticine. Draw watermelon worms in different shapes and postures with crayons.
(3) The children designed the game "Watermelon Bug Super Change", which vividly performed the movements of Watermelon Bug: crawling, turning over, rolling into a ball and turning into watermelon. ...