Key words: high school; chemical experiment; teaching concept
As far as chemistry in senior high school is concerned, experimental teaching method is often used in senior high school chemistry class, which can help students get a better introduction from basic methods in chemistry. In view of some problems existing in high school chemistry teaching, teachers must pay attention to them and find out the corresponding solutions.
I. Problems Existing in Chemistry Experiment Teaching in Senior High Schools in China
(1) The experiment teaching can not be carried out effectively
There are still some shortcomings in the process of practical operation of high school teaching experiment, the most important of which is the experimental stage. Teachers in the course of teaching set up few experimental operations, the whole classroom is mainly to learn knowledge points, few hands-on operation links. There are three main reasons: first, the school teaching equipment is incomplete, lack of experimental equipment and experimental drugs; second, many teachers are more traditional, mainly for the purpose of imparting knowledge to teach; third, influenced by traditional teaching mode, students'initiative is not high.
(2) Abuse of multimedia teaching equipment
In high school chemistry teaching, the abuse of multimedia equipment is very serious. Many teachers rely too much on multimedia equipment equipped in the classroom. In order to save the link of doing experiments, they look for experimental videos on the Internet to explain. In this teaching environment, it is difficult for students to really grasp the knowledge points, and they can not feel the pleasure of high school chemistry experiment through sensory organs. This is not conducive to teachers'training of students' practical ability, and to a certain extent, inhibits students'innovative ability and spirit.
(3) High school students lack the opportunity to do experiments by themselves.
The curriculum of senior high school is mainly the study of theoretical knowledge. Teachers need to improve the training of students'practical ability. In the traditional learning process, students are in a passive position in the classroom, which will hinder the development of students'practical ability. In recent years, China's education has been constantly reforming. Some advanced teachers have realized the drawbacks of theoretical teaching and gradually began to cultivate students'practical ability in the classroom, but they will still be limited by school experimental equipment or experimental conditions.
II. Improvement Measures of Chemistry Experiment Teaching in Senior High School
(1) Transforming teaching concepts
In order to change the current situation of Chemistry Teaching in high school, the most important thing is to change the concepts of students and teachers. As a teacher, we should gradually cultivate students'practical ability, carry out more interesting chemical experiments in class, stimulate students' interest, and gradually cultivate students'practical ability. Experiments can be carried out in different settings according to the situation. Some complex experiments can be carried out in groups, which can not only cultivate students'practical ability, but also cultivate students' team cooperation ability. For some simple experiments, students can complete them independently, so that students can find the pleasure of learning in their own hands.
(2) Developing students'interest in chemical experiments and changing teaching methods
Chemistry is an important course in senior high school. In order to make students interested in learning, we must first change the teaching methods. As a teaching teacher, we should be patient. We should also try our best to show some difficult experiments and reduce the use of multimedia. Although multimedia can accurately display and describe the internal structure of some molecules, it is not conducive to students'absorption of knowledge through watching. Secondly, it is necessary to change the way of teaching. In the classroom, more interaction between teachers and students is carried out to stimulate students' interest in learning, so that students can change from forced learning to willing learning.
(3) Effective analysis of the experimental process and results
In the process of experiment, teachers should always pay attention to the progress of students'experiment. Teachers should check the experimental data obtained by students in time. Teachers should help correct the erroneous data, and help students find out the reasons for the errors, so that students can continue the follow-up experiment and finally get the real experimental results. Teachers timely check and correct the experimental data is the most important step for students to carry out chemical experiments. The wrong data can not only lead to errors in the experimental results, but also indirectly reflect the problems of students in the experimental process, help students find problems and solve problems in the subsequent teaching process.
(4) Attaching importance to students'hands-on practice outside the classroom
Senior high school is a learning stage in which students are under the greatest pressure and the most arduous curriculum in all stages of education in our country. This stage is also an important stage for students'character formation and future development. Therefore, it is particularly important to learn chemical knowledge at this stage. Whether the students'practical ability can be cultivated or not is directly related to all aspects of their future life. However, according to the current situation of education in our country, there is little time for high school students to do their own experiments in class. As a high school chemistry teacher, we should actively encourage students to use their spare time to carry out chemical experiments, which can not only enrich their after-school life, but also review their chemical knowledge in practice.
III. Concluding remarks
In high school chemistry teaching, experimental teaching is the main method and important way of inquiry learning, and is also the most common inquiry activity in high school chemistry teaching. In this process, teachers can cultivate students'imagination and practical ability, consolidate and improve students' physical experiment skills.