As a people’s teacher who works tirelessly, it is necessary to prepare detailed lecture notes. With the help of lecture notes, teaching efficiency can be effectively improved. How to write lecture notes to be more effective? The following is a collection of lecture notes on static electricity phenomena in life that I have collected for you. Welcome to read and collect.
1. Talk about the situation of students
One of the characteristics of primary school students is that their attention span is short and their learning is mainly based on interest. But they are good at observing and imitating. Like in daily life, when you comb dry hair with a plastic comb, your hair will move with the comb; when you take off your sweater in the dry season, you will hear a popping sound; in the dry season, you will feel an electric shock when you touch the door handle; There are often thunder and lightning in the sky... Every fourth grade student will experience and observe these static electricity phenomena in life. They know that some of these phenomena are electrostatic phenomena, but most students have not conducted an in-depth exploration of electrostatic phenomena. This lesson will provide some simple and effective activities for students to explore electrostatic phenomena in life. It is impossible for students to have a comprehensive understanding of electrostatic phenomena within one class period, so students' understanding of electrostatic phenomena can only be preliminary and general. These understandings will help students initially understand the nature of electricity and are the basis for students to learn other electricity knowledge.
2. Teaching materials
"Static Electricity Phenomenon in Life" is the first lesson of the first unit "Electricity" in the second volume of the new version of the textbook for fourth grade. This lesson is the starting lesson of the "Electricity" unit. It mainly allows students to understand the common electrostatic phenomena in life and realize that electric charge exists in all materials around us. If excess electric charge is on an object, it will Static electricity occurs, and if charges move directionally along a wire, an electric current is produced. This enables students to have a preliminary understanding of the nature of electricity and feel that electricity is not mysterious, it exists around us, laying the foundation for students to learn other knowledge about electricity later.
This lesson 1*** consists of three parts:
Part 1: Experience the electrostatic phenomenon
Part 2: Understand the electric charge and the relationship between electric charges. Interaction
Part 3: Preliminary understanding of electric current
3. Teaching method and learning method
Teaching method and learning method are unified, and the teaching process is For bilateral activities between teachers and students, after the teaching purpose is determined, the teaching effect largely depends on the reasonable selection and correct application of teaching and learning methods. Based on the teaching content, teaching equipment and the actual situation of the students in this class, I used a method that combines experimental inquiry and explanation.
IV. Teaching objectives:
According to the teaching materials, the teaching objectives are as follows
Scientific concept: There are many electrostatic phenomena in life, and objects can be made by friction and other methods. charged. Objects with the same charge repel each other, and objects with different charges attract each other. Charge can flow in a circuit and create an electric current.
Process and method: In inquiry activities, you can use logical reasoning to provide reasonable explanations for observed phenomena based on existing knowledge.
Teaching focuses on explaining electrostatic phenomena
Teaching difficulties include understanding positive and negative charges
Emotions, attitudes, and values: develop students' interest in exploring scientific phenomena around them.
5. Preparation for preaching
Based on the teaching and learning methods of this lesson, determine the following preparations for teaching
Group: a plastic comb, scraps of paper , balloons, woolen sheepskins, etc.
Teacher: courseware, balloons, etc.
6. Teaching process:
(1): Magic introduction, exciting topic revelation
1. Introduction - the importance of the opening remarks of a lesson Sex is self-evident. Some people say that it is necessary to attract students' attention within 5 seconds of class. This makes sense. The basic task of the introduction is to stimulate students' desire and interest in learning, make them curious about the content they are going to learn, and form an offensive learning state. To this end, I use magic to introduce teaching content, so that students can enter the predetermined track unknowingly, and teaching at this time will have the effect of getting twice the result with half the effort.
2. Teacher demonstration: Guide students to answer, slowly approach the scraps of paper with a comb that has been combed through dry hair. What phenomenon do you see? How did the scraps of paper end up on the comb? How to explain this phenomenon? (The teacher reveals the topic in a timely manner based on student communication)
(2): Collaborative exploration and experience the electrostatic phenomenon
1. Group experiment
Take a handful of rubbed Plastic ruler, close to the scraps of paper, what do you find? Why does this happen?
2. Static electricity phenomenon in teachers and students’ communication life.
(3): Experimental exploration and understanding of electric charge
1. Teacher: Since static electricity exists in all substances, why do we usually not feel that objects are charged with static electricity? Play the courseware.
The teacher writes on the blackboard according to the courseware: positive charge, negative charge
2. The teacher explains the static electricity generated by the friction between the comb and the hair while demonstrating.
Scientists have confirmed that when a plastic comb rubs against dry hair, the hair's ability to bind charges is weak, so part of the charge is transferred to the comb, and the comb appears to be negatively charged. Hair that has lost its charge has a positive charge. What happens when hair with different charges is brought close to a comb? What kind of interaction between objects is this similar to that we know about? What does it mean? (Teacher’s writing on the blackboard: Different charges attract each other)
3. Further explore the electrostatic phenomenon - group experimental investigation.
Hang two inflated balloons next to each other on a wooden ruler, rub the contact parts of the two balloons with wool, and observe what happens.
Communication after the experiment (teacher wrote on the blackboard: Like charges repel each other)
4; Summary.
(4): Let the charge flow
Friction can transfer charge from one object to another, thus making the object charged with static electricity. But the charge in a statically charged object cannot flow continuously.
How can we make the charge in an object continue to flow? To form an electric current, electric charge must flow, which requires two conditions: power and circuit.
Courseware playback-enables students to have an intuitive understanding of circuits.
(5): Summary and expansion
Summary is the end of a lesson. Review the key points of this section to deepen the impression. So I devised the following question.
What did you gain from this class?
7. Talking about the design of writing on the blackboard
Writing on the blackboard is a channel for students to obtain information through vision. During teaching, writing on the blackboard plays a role in clarifying key points and inspiring thinking for students. A better blackboard design can also give students a sense of beauty.
To this end, I designed the following blackboard writing:
Static electricity phenomenon in life
Positive charge, negative charge
+—
Same type of charge Mutually repellent
Different charges attract each other