Teacher Bobo studied chemistry in NMET for ten years, and suggested that students do the following: 1. Step by step, lay a solid foundation, differentiate and clarify concepts, and make a better study plan according to your own learning situation. Read more books and master the essence of the main knowledge in textbooks, such as material structure, redox reaction, ion reaction, knowledge of elemental compounds, electrochemistry, chemical experiments, chemical calculation and so on. Review should pay attention to the foundation, strengthen the understanding of knowledge and the cultivation of ability, and strive to "remember-understand-use". We should focus on our own learning situation, check for leaks and fill gaps, and review with emphasis and pertinence. 2. Master the principle, use it flexibly, and pay attention to solving problems. Emphasis is placed on reviewing chemical principles, such as the principle of conservation of elements, redox reaction, conservation of electron gain and loss, chemical equilibrium, material structure, and the general law of interrupted bonds in organic reactions. Mastering the basic principles and laws of chemistry and using them flexibly in solving problems, such as applying conservation method, difference method and discussion method to solve some calculation problems, can improve the speed and accuracy of solving problems. To infer the structure of organic compounds, it is necessary to master the transformation law of organic functional groups and the basic types of reactions. 3. Strengthen practice, review old knowledge and improve problem-solving ability. There are many ways to practice. First of all, you can focus on doing some exercises you have done. Secondly, we should choose a chemistry reference book and choose it as synchronous exercise according to the review progress. Don't answer one question to another, but finish a section or a unit before changing the answer, check whether it is right or wrong, and ask your classmates or teachers in a certain way if you don't understand.