# Teaching Plan # Introduction Fingerprints, also called handprints, are the raised lines on the epidermis. Since human fingerprints are produced by a combination of genetics and environment, everyone has fingerprints, but they are different. Because the fingerprint repetition rate is extremely small, about one in 15 billion, it is called a "human ID card". The following is the content compiled for everyone, welcome to read and refer to it.

Article 1 Middle Class Science "Interesting Fingerprints" Lesson Plan Activity Purpose:

1. Cultivate children's interest in exploring themselves.

2. Cultivate children’s meticulous observation ability.

3. Guide children to know that everyone’s fingerprints are different

Activity preparation:

1. Several boxes of red ink pad, white paper, and some rags.

2. One magnifying glass for each person.

Activity process:

1. Introduction: Tell children a story about using fingerprints to solve crimes, arousing their interest in observing fingerprints.

2. Expand

(1) Print fingerprints

Let the children dip their fingers in ink mud to print their fingerprints on the paper, and ask the children to talk about their findings.

(2) Observing fingerprints

1. Guide children to use a magnifying glass to observe their fingerprints and fingerprints on paper, and talk about what their fingerprints look like and what they look like.

2. Guide children to observe each other’s fingerprints and talk about the differences between each person’s fingerprints.

3. Understand the function of fingerprints

1. Show two typical fingerprints from teachers and guide children to observe their differences and find the characteristics of their own fingerprints. Tell young children that everyone’s fingerprints are different and never change, so they can be used to identify people.

2. Demonstrate using fingers dipped in ink pad to touch glasses, pens, phones and other objects one by one, and ask the children to talk about what they discovered. When our fingers come into contact with objects, fingerprints will be left behind.

Where does this help? (The police officer can use the fingerprints left by the criminal as evidence to catch the criminal.)

3. What other uses are there? The teacher showed pictures of technological products related to fingerprints to explain to the children, broadening their horizons.

4. What else has some texture like fingerprints?

4. Conduct fingerprint printing

1. Guide children to print fingerprints.

Part 2 Middle Class Science "Interesting Fingerprints" Lesson Plan 1. Topic: Middle Class Science "Interesting Fingerprints"

2. Textbook Insights: In the selection of activities, we chose "Fingerprint" is the exploration object of the entire activity. This activity object is both familiar and strange to children. It allows children to discover their own mysteries and stimulate their desire to explore and operate.

3. Target presets:

1. Preliminarily understand the types and characteristics of fingerprints and the simple applications of fingerprint technology.

2. Explore the method of fingerprint rubbing during the activity.

3. Can use fingerprints to create different images and give full play to children's imagination and creativity.

In the design of the goal, the goal is positioned in the process of observation, discovery, exploration, and operation. In a relaxed and free communication atmosphere, children are encouraged to boldly explore and find. As a result, through a series of independent operations between themselves and their peers, they can experience the joy of collective learning.

IV. Key points and difficulties:

Key points: Understand the types of fingerprints and know the unique characteristics of fingerprints.

Difficulty: Understand the simple application of fingerprint technology in life, and be able to use fingerprints to shape your image.

5. Design concept:

This activity is designed with the educational concept of “striving to form a cooperative and inquiry-based interactive relationship between teachers and children”. In addition to influencing children with full emotions, Various "problem situations" are also designed to allow children to observe purposefully and solve problems during the observation process. Guide and help children to think and explore, and fully mobilize their enthusiasm for inquiry. Throughout the activity, teaching methods such as observation, recording, experience communication, demonstration, and operation are mainly used throughout the entire activity.

6. Design ideas:

Children are born with curiosity. Children are both familiar and unfamiliar with "fingerprints". When children play with plasticine, You will find that you have left many traces on your works, but you do not know that fingerprints are unique to each person. The "Interesting Fingerprints" activity closely combines children's interests and curiosity, allowing children to express their curiosity through With the help of others, you can discover the secrets of fingerprints, understand the types of fingerprints, know the unique characteristics of fingerprints, develop a clearer understanding of fingerprints, and be able to use fingerprints to shape your image.

7. Teaching process

Activity preparation:

1. Courseware "Interesting Fingerprints"

2. Magnifying glass, ink pad, transparency Tape, watercolor pens, play dough, rags, toddler drawing paper, and markers.

Activity process:

1. Watch the animation "Detective Conan" to bring up the topic of fingerprints.

Introduction: Detective Conan found a pistol at the crime scene. Whose pistol does it belong to? Who is the real murderer?

1. Children watch clips from the cartoon "Detective Conan's Fingerprints".

2. Question: What helped Conan find the real murderer? (Based on the fingerprints of the third person snatched).

2. Observe fingerprints, understand the types of fingerprints, learn how to rub fingerprints, and know that everyone’s fingerprints are unique.

(1) Observe fingerprints and understand the types of fingerprints.

Click on the fingerprint picture to appear, and use the spotlight function of the whiteboard to guide children to observe fingerprints and understand the types of fingerprints: ① Dustpan pattern - Features: Its central texture opens to one side like a dustpan; ② Vortex pattern Pattern - Characteristics: Its center is a closed circle, and the circles are like small whirlpools in the pond (or the shells of small snails).

Teacher: Our fingerprints generally fall into two categories, scroll patterns and skip-shaped patterns. (Spotlight observation) If you look carefully, the center of the swirl pattern is a closed circle. What does this texture look like?

Young: Like a snail shell, like the annual rings of a tree, like a dimple in a pond... (Click on the scroll image to see a picture of a snail on the left, and a picture of a vortex below).

Teacher: Let’s look at the Kei pattern again. What does its central texture look like when it opens to one side?

Young: Like the patterns on the wood, some are like curved bows, and the center is like a pony's feet... (Click on the dustpan picture below the dustpan-shaped pattern).

Teacher: The central texture of the dustpan-shaped pattern opens to one side like a dustpan, so it is called a dustpan pattern. Some dustpan-shaped patterns have a central texture that opens wider on one side, like a bow and arrow, which is also called a bow-shaped pattern. Pattern.

Teacher: So what tools can you use to observe your fingerprints more clearly?

Young: Use a magnifying glass to enlarge the fingerprints to see them more clearly.

Children use a magnifying glass to independently observe their own and their peers’ fingerprints. (Children know the type of their own fingerprints through independent observation.)

Teacher: Whorl patterns are also called whorl patterns. When I was a child, I heard my grandparents tell a nursery rhyme about snails. One snail is clever, and two snails are clever. Well, three snails and four snails carry straw, five snails are poor, six snails are rich, seven snails and eight baskets open a pawn shop, nine snails are scholars, and ten snails are number one. How many whorls do you have? How many Kei-shaped patterns are there? (Nursery rhymes help children understand the types of fingerprints of themselves and their peers.)

(2) Through discussion and practice, learn the method of rubbing fingerprints.

1. Tell the children how to print fingerprints.

Teacher: Now that we know the types of fingerprints, is there any way to print them? (Encourage children to think and answer questions based on their existing life experiences, and talk about the method and method used to print.)

Children: Use a water pen to apply it on your finger and print it on the paper.

Young: Dip your fingers in ink pad and stamp it on the paper like a seal.

Young: Press your finger firmly on the plasticine and it will be printed.

Young: Breathe on the glass and put your fingerprints on it.

Young: Sprinkle flour on the table, put your hand on it, and there will be fingerprints.

…………………………………………

2. Try to imprint fingerprints through various operating materials.

Teacher: The children’s idea is really good. Then choose the materials you need and give it a try to see which method can print your fingerprints most clearly.

Children use the tape, plasticine, watercolor pens, ink pads and other materials provided by the teacher to operate. The teacher guides around and provides necessary help to the children in a timely manner. During the operation, a child discovered that the fingerprints on the tape were particularly clear and excitedly shared it with his peers. Children around him tried it one after another.

Teacher: After trying it, what experiences do the children have to share with you? How do you think you can imprint your fingerprints most clearly?

Young: The fingerprints of Ha Qi Seal disappeared immediately. (showing a disappointed expression)

Young: I can only print fingerprints on the plasticine but they are not very clear.

Young: I saw the tape. It was sticky and the printing was very clear. (Hold up the tape for everyone to see)

Young: I printed it with ink pad. (Showing it to everyone, I found that some of the ink pads are smeared together, some are very clear, and some are hard to see clearly)

Teacher: Please help me find the reason why some of the ink pads are smeared. Some are clear and some are very faint?

Young: There is too much ink pad on the finger, and it becomes muddy when touched.

Young: If there are too few, you won’t be able to print fingerprints.

Teacher: The summary is very good. When we use ink pad to rub fingerprints, we use the pad of our finger to dip a little ink pad and press the pad of the finger firmly on the paper. The pad of the finger cannot move and quickly remove it. , so that your fingerprints can be clearly recorded. (Detailed explanation of using ink pad to rub fingerprints to add to the final fingerprint.)

(3) Further observe and compare fingerprints to know that everyone's fingerprints are unique.

Teacher: Are our fingerprints all the same? (Not the same) The types of fingerprints are different, and the number of fingerprint types is different. So are the texture lines of fingerprints of the same type the same? (Click to display six swirl patterns. Use the spotlight function on the whiteboard to guide the children to discover that they are also swirl patterns, but their texture lines are more or less different.)

Teacher: Everyone's fingerprints are unique, and even if they are of the same type, there are subtle differences.

Summary: Fingerprints are innate to us humans. They were formed when we were still fetuses in our mother’s womb. So far, it has not been found that different people have the same fingerprints. Therefore, everyone's fingerprints are unique, and the pattern of fingerprints will not change throughout a lifetime.

3. The application of fingerprints, a preliminary understanding of the uniqueness of fingerprints in daily life.

Teacher: Because fingerprints have unique characteristics, people have designed many high-tech products with the help of fingerprint technology. (Show the fingerprint sign-in machine) Look, what is this? Have you seen it?

Young: There is one in my mother’s school. When my mother goes to work in the morning, she presses it with her hand, and the principal will know if her mother is late.

Teacher: This is the fingerprint sign-in machine. There is one at the gate of Hanhan’s mother’s school. It stores the fingerprints of all the teachers in the school. Every morning, the teachers click on the sign-in machine and everyone The fingerprints are all different, and it can accurately record the time when the teacher goes to work. So where else can fingerprints be used?

Younger: Fingerprints solve crimes (Conan uses fingerprints to solve crimes), the fingerprint switch on the computer, seeing his father stamp his fingerprints in the bank...

Teacher: Because fingerprints are unique, fingerprints Technology can better protect our own property and privacy. (Click to display a dynamic video album to show children fingerprint technology products such as fingerprint locks, fingerprint safes, fingerprint access control, bank card fingerprint payment, car fingerprint recognition, and fingerprint mice.) Fingerprint technology products bring convenience and security to our lives.

4. Add pictures with fingerprints to guide children to use their imagination and creativity.

(1) Teacher training.

Teacher: Fingerprints can not only bring convenience and security to our lives, but also bring us different surprises. (Click to display the screen: fingerprints. The teacher adds normal drawings on the fingerprints to guide the children to imagine what they can become.) (Become a small fish, a kitten, a character, etc.)

(2) Children in Use fingerprints to create different images on the whiteboard, allowing teachers and children to interact.

Teacher: Fingerprints can have so many changes. Do you have any better ideas? Who wants to give it a try?

Children try to add pictures on the whiteboard courseware to create various interesting images.

(3) Children create creative fingerprint works independently.

Teacher: The children have so many ideas that they can’t even be drawn on the whiteboard. Are you willing to show your fantastic ideas on drawing paper and share them with everyone?

Children use the methods they have learned to rub fingerprints and add fingerprints. (Background music plays)

(4) Display of fingerprint works.

Children display their works on the display board and explain their creativity to teachers and peers.

Part 3 Middle Class Science "Interesting Fingerprints" Lesson Plan Activity Objectives

　①Be good at observation and discover the secrets of fingerprints.

② Think positively and be able to make bold suggestions on the role of fingerprints based on daily experience.

The activity focuses on understanding the differences of fingerprints and the meaning of fingerprints to each person.

Difficult activities cultivate a spirit of observation, fun and exploration.

Prepare teaching videos, ink pads, and some blank paper for the activity.

Activity process

1. Play the video and import fingerprints

Teacher: Hey... what are they doing? (In the video, some people use fingerprints to check in, open doors, draw pictures, etc.)

Young: They are opening the door. That is the "fingerprint lock". Use your thumb to press the glowing place on the door, and the door will open. Now...

Teacher: What are those two people doing? They looked happy. Why did they put their fingerprints on the paper?

Young: They were discussing things, and then they all agreed, and then they pressed their fingerprints. I saw it on TV, and my dad said that if two people agree, they will press their fingerprints!

Teacher summary: Fingerprints have many functions. They can be used to open doors, sign and stamp, clock in, and draw pictures.

2. Fingerprints are different and are a symbol of each of us’ identity

Teacher: We just learned that fingerprints have so many functions, but why can our fingers be used as keys to open doors? Can it represent each of us like a name? Next, let the children carefully observe our thumbs and see what is different?

Teacher summary: Some of the things on our fingers are like spirals, and some are like patterns, which are our fingerprints. Everyone’s fingerprints are different, some are long, some are short, and some are like patterns. Some are big, some are small, and the patterns are also different.

It represents each of us just like our name.

3. Fingerprint painting to enhance understanding

This link allows children to paint with fingerprints to further understand their own fingerprints, develop their imagination, and boldly innovate.