First, the role of preview before class
Preview is self-study before class. Refers to reading a new lesson independently before the teacher gives a lecture. A preliminary understanding of the content is a process of preparing for accepting new knowledge in class. What is the function of preview before class?
1, preview is beneficial to cultivate good study habits.
Before class, if students can preview carefully, they will listen carefully and learn better. With this experience, students will actively preview the next part of the content, thus forming good study habits. Pre-class preparation enables students to master the method of self-study, learn to study independently, cultivate students' reading ability, understanding ability and problem analysis ability, and lay a good foundation for lifelong learning.
2. Preview helps students find their own weaknesses.
Some students have a hard time learning mathematics, can't keep up with the progress of the teacher's class, and get into trouble. There are many reasons for this situation, one of which is that the old knowledge base is not solid, which causes obstacles in learning. Preview helps to find the weak links in knowledge, make up this part of knowledge quickly before class, remove obstacles in related knowledge, and pave the way for learning new knowledge.
3. Preview can improve the efficiency of listening to lectures.
Through preview, we can initially understand the basic content of the new curriculum and find the key points, difficulties and doubts. In this way, the learning goal is clear, the attitude is positive, the attention is highly concentrated, and the passive is turned into active, which greatly improves the effect of listening to lectures.
4. Preview is conducive to enhancing the pertinence of teaching.
When students preview, teachers patrol and check to keep abreast of students' mastery of teaching materials, and can also measure students' existing knowledge base from difficult questions raised by students. Therefore, teachers can grasp the key and difficult points, carry out teaching with a clear aim and avoid the tendency of average exertion and subjectivism.
Second, guide students to prepare well for senior high school mathematics.
1, the preview goal should be clear and specific.
Preview is an activity that allows students to learn purposefully and actively with questions, and it is the premise of participating in teaching. However, most students have very low requirements for themselves. In the preview, simply look at the teaching content and get a general idea. Therefore, teachers should cultivate students' autonomous learning ability in all aspects of teaching, make full use of teaching materials, excavate teaching materials, give a certain range of preview contents, and put forward specific requirements, such as knowledge goals and skill goals, so that students can preview with questions and find out the key points, difficulties and doubts in preview.
2. Guide preview method
The guidance of mathematics preview method is mainly divided into the following seven steps:
(1) Read through the math content, circle the knowledge points and understand the main content. This process is mainly aimed at conceptual mathematical knowledge. In the process of reading through the content, students learn new mathematics knowledge as a whole. Draw a picture, circle the concepts and conclusions that you think are important, so that the main content of the new lesson appears, and prepare for understanding and mastering knowledge.
(2) read the content carefully, understand the main mathematical knowledge. This is the main part of the preview. After students have a certain understanding of mathematical knowledge, they should be instructed how to "digest" this knowledge.
(3) Intensive reading of difficult contents, thinking and marking doubtful points are important parts of math preview. Preview is not equal to self-study. For the difficulties encountered in preview, students should be encouraged to try their best to understand knowledge through their own thinking and analysis, and it is not necessary to solve them in preview. Finding problems is the key to preview. "Learning begins with thinking, and thinking comes from doubt", and preview is the process of seeking doubt. Because there are problems, students have a goal in learning new courses. Learning with goals will get twice the result with half the effort. Key comments.
Learn to think and be diligent in questioning. This is the core of reading, but also the key to preview, focusing on thinking and understanding. Einstein said: "To learn knowledge, we should be good at thinking, thinking and rethinking." ⑥ When previewing, it is required to read the text carefully, think about the preview questions, and understand what the knowledge points required by the questions are, and what is the connection between the content of the response and the knowledge points before and after. If we think about these problems clearly, students will be able to master what they have learned more systematically and organically, thus getting twice the result with half the effort. The ancients said, "Learning is expensive and doubtful." Einstein thinks that it is more important to ask questions than to solve them, which also shows a person's creative ability. "Rehearsal in-depth will have questions. This is also a higher standard of preview requirements. Generally speaking, students rarely can do this. Therefore, we must pay attention to cultivating students' habit and interest in asking questions. Putting forward these questions is very helpful to deeply understand the content of the text and explain the characteristics of the object, and also helps to improve students' ability to ask, analyze and solve problems.
⑤ Learn from others. This refers to the discussion in the preview process. Although the preview is mainly conducted independently, some questions and opinions need to be discussed with classmates before they can be clear, so some people say that "discussion is a good medicine for strengthening the brain and improving eyesight." This makes sense. The discussion here is to put forward the difficult problems encountered in the preview and discuss some problems with the surrounding students in order to solve and correct them. This can not only create an atmosphere of exploration, but also activate thinking and improve the preview effect. If the above questions are discussed, they will certainly arouse everyone's interest.
6. Remember best. This is previewed excerpts and notes, and it is also a good self-reading method. Xu Teli said, "No pen and ink, no reading." Preview also needs pen and ink to achieve good results. That is to say, it is required to extract and write down the answers to the questions that have not been understood in the preview, as well as the questions solved by consulting materials and participating in discussions, so as to prepare for future discussions, lectures and accumulation of information.
⑦ Try to practice and test students' preview effect, which is an essential process of math preview. Mathematics is different from other disciplines, and it needs mathematical knowledge to solve problems. Students have initially understood and mastered new mathematics knowledge through their own efforts, so students should test their preview effect by doing exercises or solving simple problems. It can not only make students reflect on the loopholes in the preview process, but also let teachers find the problems of students concentrating on learning new knowledge, thus grasping the important and difficult points in classroom teaching.
In a word, preview before class is an essential part of learning mathematics well. Doing a good preview before class can not only clarify the key points and difficulties of the new class, but also find out the problems that you don't understand, so as to facilitate classroom learning, and also help cultivate self-study ability and enhance innovation consciousness.