Poor grades in chemistry I always get sleepy in class What should I do

The basic solution to the difficulty in class is to ask positive questions, and you try to raise your hand for every question the teacher asks. Although you may have poor grades and answer all the wrong questions, the questions will increase your motivation, don't be afraid of your classmates laughing at you, they are not as good as you. At the same time, the teacher will see that you want to improve your grades, and he will take more care of you.

As for you, in order to make fewer mistakes, you can't help but listen to the lectures.

Start by working on each problem, you will have a positive attitude, not only in chemistry, but also in various subjects, and you will make great progress.

You can drink coffee and something to refresh yourself, and then study chemistry at a fixed point in your usual self-study time, and look at some things about chemistry in your spare time, and cultivate your interest in learning, such as thinking about what substances are made up of things around you, and what characteristics and functions they have. You should have the confidence that you can learn, that you can learn well, and that you can study hard, and after a few months of perseverance, you look back and see that it is not difficult, and you have already opened up to the subject.

If you're interested in chemistry first, you won't be sleepy, and the reason why you're sleepy is because you're not interested.

Would it be better to drink some coffee or tea? It's also best to take an early break, or if you are in class.

Chemistry should be said to be the most interesting subject in middle school, and if you delete the calculation question type, it is basically an entertaining and reasoning subject.

It is recommended to buy or borrow some popular science books on chemistry from the library, which can arouse interest.

When I first studied chemistry, I went to a glass equipment store to buy all kinds of bottles and cans, and then did my own experiments, which was very interesting. The total cost is calculated, and it will cost about 1,500 yuan to complete all the high school experiments. Among them, the more expensive unit prices are agno3 and balances.

Not only do middle school experiments, but you can also find other experiments to do by yourself, and even create your own aimless experiments without the teacher's care. For example, NA is simple, very curious to know what will happen if a large piece of NA (such as plum fruit, walnut) is thrown into the water, so one day after the Spring Festival is after a heavy rain, I took a few pieces out and threw them into the water stall, and then stirred up a water column more than 3m high and the sound of **, which is more fun than lighting fireworks. But you should still be on the safe side.

Now I'm too lazy to do experiments, and it's not bad to put the instruments as decorations.

Chemistry is a fascinating subject. However, due to the characteristics of high school chemistry as "complicated, difficult, and chaotic", many students find it difficult to learn high school chemistry. So how can you learn chemistry in high school?

1. Listen carefully and take good notes.

Good notes are the condensation, supplementation and deepening of textbook knowledge, and the presentation and refinement of the thinking process.

Since the knowledge points of chemistry are numerous, fragmented and scattered, in addition to listening carefully and thinking positively, in addition to listening carefully and thinking positively, we should also write down the key and difficult knowledge of the teacher in our own words on the basis of understanding, so as to facilitate future review.

2. Review in a timely manner.

Revision is not just a simple review of knowledge, but considering the interconnection of old and new knowledge in one's own brain, and reorganizing it to form a new body of knowledge. Therefore, after class, it is necessary to review the content of the lecture in a timely manner, and do a good job of sorting out and summarizing the knowledge, so as to make the knowledge integrate and avoid the phenomenon of more and more chaos in learning. For example, if you learn about the bleaching properties of SO2 and chlorine water, you can compare them to find out the differences.

3. Learn to memorize.

Since there are many chemical knowledge points to memorize, it is difficult to memorize them if you rely on rote memorization, so you should learn to memorize them skillfully. The commonly used memorization methods in chemistry are: comparative method (often used for knowledge that is easily confused and interferes with each other.

The four similar concepts of isotope, allotrope, homologue, and isomer can be deepened and remembered through comparison. ), induction, song recipe memory, comprehension memory, and experimental memory.

Fourth, practice diligently. Practice is an important way to understand, digest, and consolidate classroom knowledge. However, the practice should be targeted, not a sea of tactics, and should be aimed at mastering the basic methods and the rules of problem solving. In the process of problem solving, it is necessary to pay attention to multiple solutions and inductive summarization of one problem, so as to achieve the effect of doing one problem and one category.

For example, the techniques commonly used in chemical calculation include: conservation method, relational method, extreme value method, average value method, estimation method, difference method, etc.

5. Prepare a "mistake book".

The purpose of the questions is to develop abilities and find effective ways to find your weaknesses and deficiencies. Therefore, mistakes should be corrected and recorded. When recording, you should analyze the reasons for the error and the correct solution idea in detail, and do not simply write an answer.

At the same time, it is important to go through the review frequently so that you can avoid similar mistakes in the future.

6. Pay attention to chemical experiments.

Chemistry experiments can not only cultivate students' observation, thinking, hands-on and other abilities, but also deepen their knowledge and understanding of related knowledge, so we must pay attention to chemical experiments. When doing experiments, we should ask a few more whys, think about how to do it, why we do it, and what else can be done, so as to achieve the purpose of "knowing what it is and why it is true".

In addition, in order to study chemistry well, we should pay more attention to social hot issues and life problems related to chemistry, and be good at combining book knowledge with practice.

In short, as long as the learning method is correct, I believe that students will easily learn chemistry.

Broadly speaking.

Don't be too nervous Generally speaking, the content of the first chapter test is basically very basic, and the test is all about the rules in the book, so you should remember more Maybe you are sloppy.

In the future, think more about whether you really understand it, and don't let it go if you don't understand.

Cultivate chemical thinking habits from macro to micro, from words to symbols, from experiments to conclusions, from qualitative to quantitative + basic knowledge to be implemented + set the goal of the next monthly exam + pay attention to the special examples given by the teacher in class + independently complete some unit mock questions ==== Chemistry learning masters.

I don't listen to or memorize in class, I don't preview when I go home, and I don't observe experiments during experiments. Don't do the exercises. It's not good to learn.

...When you first study chemistry, you have to memorize it, summarize the rules after memorizing to a certain extent, and transform from a liberal arts to a science major.

Then it's all about asking the teacher more questions.

I'm also in junior high school, and I think that only by memorizing elements 1-18 can I learn chemistry well in junior high school, and I must check out the main points before class, write homework, and review it beforehand, and that's how I learned.

Build your own body of knowledge! In other words, organize more knowledge! If you can't study, put it aside and take the exam carefully! ~~

In fact, you can ask yourself, are you really serious about learning?

Chemistry in the third year of junior high school is not difficult, as long as you memorize it a little, you can get a high score, the questions sent by the teacher are carefully studied thoroughly, and the basic knowledge is memorized by yourself, you can do these two points. I wish you success!!

I am a quasi-senior in high school, I was not good at chemistry in junior high school, but in the third year of junior high school, I practiced seriously, memorized equations, asked the teacher immediately if I would not, and some of the confusing and easy to make mistakes were recorded in a small book, and I usually took it out to see when I was free, and looked at the comprehensive paper when reviewing, the high school entrance examination will not be too difficult, come on! In the end, I got more than 90 in the exam).

Listen carefully in class, memorize often after class, and review more after school (review the old and learn the new).

Believe in yourself (and I used to do too).

You have to learn them rationally, classify them, those things belong to a class of reactions, those that are vertical and a type of precipitation, those that can be put together, those that are easy to react, and then there are notes that must be done with a spiritual point instead of being disciplined and copied.

Yes, chemistry is not complicated in the third year of junior high school, but it will be difficult in high school.

I am also a student. I think that the most important thing in learning chemistry is to memorize chemical equations, which is what our teacher reminds us that as long as we remember and understand chemical equations, then chemistry should be fine.

I think so, I don't know if it helps you.

There are many chemical knowledge points, classification and summary, and memory is quite crucial.

Take good notes in class, there is no problem in connecting the knowledge, chemistry is quite simple, you don't have to think about it so complicated.

The best first chemistry major is Peking University, the second is Jilin University, I am lucky that I am studying at Jilin University, I guess you will not be able to infer and calculate the problem, like you are not a beginner, you can fill in all the possible questions of this type of question type in the early stage, you can still get good scores if you don't have a smart mind to learn chemistry, and when you get to college, you rely more on memory, so I suggest you still memorize it.

Chemistry is relatively dead Take more notes in class Chemistry is just a few questions The structure is fixed after the comprehensive examination in the third year of high school It is nothing more than a chemical structure Ah properties organic chemical process experiment** And then usually do these kinds of questions Practice every day There are rules Some empty answers are almost the same It is very important to take notes.

Chemistry is indeed more difficult, but chemistry problems are analyzed using some of the same knowledge points. There are so many reaction principles, so if you want to learn chemistry well, you need to do more problems, understand the principles in the problem, and only in the end can you use them proficiently.

If you encounter any problems with chemistry in the future, welcome to solve them with me.

Don't be afraid, you say your chemistry is bad, I feel like you don't trust yourself a bit. Chemistry is actually very interesting, you have to have self-confidence, I suggest you lay a solid foundation, first read the textbook, test whether you have gained, you do the exercises in the textbook, when reading the book, you must be distracted, think positively, smell yourself a few whys, and then, you close the book, think about those knowledge points, think about the connection between them, and then compare the textbook to see what is missing. When you are in class, you must keep up with the teacher's rhythm, preview before class, and you must complete the homework assigned by the teacher carefully to ensure that you have mastered those questions, and then you find some questions to do, do not require quantity, pay attention to quality, and do big questions, which are relatively comprehensive topics.

Do the questions. Seriously complete a five-year college entrance examination three-year simulation, and usually complete a lot of questions issued by school teachers.

It's no wonder you don't improve your chemistry grades.

If you don't spend time, you can't improve, and the tactics of the sea of questions pay attention to the proficiency of doing the questions.

I was ranked in the top 200 chemistry in Jiangsu Province, and I finished two chemistry tutorial books in my freshman year of high school, and then chemistry was invincible. If you have a high level of talent and a strong understanding of chemistry, you can do a little less, in short, until you don't need to do it.

It's a pity that you shouldn't listen to it, because you're too lazy to do it and don't have time to do it.

Hurry up and catch up. I'm also a sophomore in high school! Build faith. Memorize more knowledge points.

It's better in junior high school, basically those knowledge, in high school, it's more troublesome, the basic skills are not good, and the next knowledge is more difficult to learn, it is recommended to do more questions, keep making mistakes, and keep improving.

Read more books, figure out the things in the books, and then string together the knowledge points, read them every day, and repeat the practice questions after a few days.

Understand and digest the commonly used chemical equations, and then memorize the elements that need to be mastered in the periodic table, and memorize the common gases and special elemental gases.

Find a chemistry teacher and tutor it!

Pay attention to the review of the exercises you have done, some big questions can be read first, and then write a compilation after you are familiar with the ideas of doing the questions. In fact, there is still a rule in the idea of asking questions in junior high school. I'm too lazy to summarize, you can flip through the papers, and you will find a lot of similar questions, put them together and do them until it's disgusting (basically you can't do 10 is enough), at most 30 question types, all of them are done, and you will be invincible.

In addition to the tests in the book, the physical properties, chemical properties, valence, proton number, etc., you should also be familiar with the commonly used chemical formulas and nitrogen content, and draw inferences from each question. For example, the notation of element symbols: H hydrogen N is nitrogen, P phosphorus o oxygen C is carbon, calcium CA barium BA, Si silica sodium Na, Pb lead, mu manganese, K potassium I iodine Cu copper, gold Au silver, AG, w tungsten Al aluminum, mercury Hg, magnesium mg, Zn zinc, Cl chlorine, iron, Febr, bromine, S sulfur.

Remember this slip, the commonly used elements are remembered, and there are 1---20 elements, valence, can be compiled into a slip, very easy to remember, the main thing is to do the question every day while remembering, the valency used, the amount of chemical formula, physical and chemical properties, etc., you will soon reach the touch bypass, 100 questions of chemistry test paper you can do in 30-40 minutes, and the accuracy rate will be very high.

Don't be discouraged, junior high school chemistry only has two books in the third year of junior high school. I memorize the formula thoroughly and understand it myself, and then I just do some questions that I am not too good at doing too well, and I wish you a good score in the exam.