Junior high school biology single-cell biology open class teaching plan and reflection and evaluationThe following is an example of a junior high school biology single-celled biology lesson plan:
* * 1. Teaching objectives **
1. knowledge objectives
- To let the students understand that single-celled organisms can complete life activities independently.
- Students will be able to give examples of the relationship between single-celled organisms and humans.
2. ability objective
- Through the observation of the Paramecium under the microscope, students 'microscope operation skills will be strengthened.
3. emotion goal
- Cultivate the students 'learning habits of thinking positively, taking the initiative to explore, and speaking boldly.
* * 2. Important and Difficult Points in Teaching **
1. teaching focus
- Single-celled organisms could complete life activities independently.
2. teaching difficulties
- The principle of single-celled organisms completing life activities independently.
- Use a microscope to observe the Paramecium accurately.
* * 3. Teaching preparation **
1. experimental preparation
- Paramecium culture fluid, microscope, glass slide, cover glass, dropper, magnifying glass, some cotton fiber, tweezers.
2. Teaching Coursewares.
* * 4. Teaching process **
1. to lead
- Through the basic units of biological structure and function, the structure levels of animals and plants, and other knowledge that he had learned before the review, he showed the picture of the eye worm and compared it with the multicellularized organism to draw out the concept of the unicellularized organism.
2. Teaching new lessons
- Common single-celled organisms
- Show pictures of single-celled organisms such as bacteria, yeast, Paramecium, Amoeba, Chamaesium, and euglena to let students understand the variety of single-celled organisms. The students were guided to think about their living environment and came to the conclusion that most single-celled organisms lived in water (freshwater and seawater) or humid environments (moist soil, tree trunks, etc.), and some of them were parasitic on other organisms. They also emphasized that although single-celled organisms were composed of only one cell, they could independently complete life activities such as nutrition, breathing, secretion, movement, reproduction, and so on.
- Observation of Paramecium Experiment
- The purpose of the experiment was to observe the appearance and movement of the Paramecium.
- He introduced the experimental materials and tools, such as the culture fluid of the Paramecium, the microscope, and so on.
- Ask the students questions before the experiment, such as why they were absorbing from the surface of the culture fluid and the effect of putting cotton fibers on the droplets.
- Students conducted experiments and thought about related questions, such as what could be observed with a magnifying glass, what the shape of the Paramecium looked like, and so on. The group representative reported the experiment results, the teacher commented, and finally played the experiment video.
- Internal structure and physiological function of Paramecium
- The picture of the structure of the Paramecium was shown. The explanation was that it moved through the cilia, and the cilia moved to make it rotate in the water and respond to external stimulation. It obtained nutrients through the mouth groove and digested food through the digestive vesicle. It discharged waste from the body through the anus and expansion vesicle. It breathed through the surface membrane. It also explained the reproduction methods of the Paramecium, including division reproduction, mating reproduction, etc., so that the students could understand that although the Paramecium only had one cell, it had the common characteristics of all living creatures and could independently complete various life activities.
- Other single-celled organisms
- Show a picture of Chamaematis and give a simple explanation. Let the students know that there are many single-celled organisms similar to the Paramecium.
* * Reflection and Evaluation **
1. merit
- The integration of experimental teaching could help improve students 'interest in learning and hands-on ability. For example, in the experiment of observing the Paramecium, students could operate the microscope themselves and intuitively feel the shape and movement of single-celled organisms. This was better than purely theoretical teaching.
- The question-and-guide teaching method could stimulate the students 'thinking ability. The questions set in each teaching link, such as the questions before the experiment, could allow the students to observe and think in a targeted manner during the experiment, and cultivate the students' scientific literacy of active inquiry.
- The use of multi-media could visualize abstract knowledge by showing pictures of single-celled organisms, the structure of the Paramecium, and motion videos. It could help students better understand the concept and structure of single-celled organisms.
2. deficiency and improvement
- In terms of class time control, when students were doing experiments and group discussions, there might be situations where the time was too long or too short. In the future, he could plan the time of each link more accurately, predict the possible situations of the experiment in advance, and guide the students 'reports more effectively to ensure the smooth progress of the teaching.
- Students with weaker learning abilities might have difficulty understanding the internal structure and physiological functions of single-celled organisms. They could add more analogies or simplify the explanation of complex concepts in the teaching process, and provide more tutoring materials or one-on-one tutoring after class to meet the learning needs of students at different levels.
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