Math, advice. Find a tutor in the summer vacation, or find your teacher to make up lessons. But the number is small, preferably less than ten, so that teachers can give one-on-one tutoring. Ask if you don't understand, and then take a notebook and write it down. Such as operation methods, ideas, etc. Then buy yourself an exercise book. Not too hard. Do five questions every day. If you don't understand, ask the teacher when tutoring. That's how I got here. I spent two months in the summer vacation, making up math almost every day. In the past, junior high school math failed, and senior high school math never failed. That is, two months of summer vacation. Now math 100, any exam is above 75. The highest score is 90. Our school is still a national priority (the question is more difficult), and the unified examination is basically stable at around 80. Junior high school and senior high school have never heard of mathematics. I think your background should be better than mine. Physics, buy a Wang Houxiong in summer vacation. Take your time. For example, you can try to change each option in multiple-choice questions. Wrong questions are often read. That's how I learned it anyway. Full physical score 100. Almost seventy or eighty every time. If the exam is unified, it will be above 90. Physics, we must learn to summarize and find models. Sometimes one method can solve multiple problems, and you just need to memorize your ideas. Chemistry, my best subject. Often over 90. I got full marks several times. This is mainly a matter of accumulation. Every class of chemistry from junior high school must be very serious. Learn more equations and concepts. Pay attention to returning to the textbook, and then do some exercises. Biology, the method is similar to chemistry But biology, such as compulsory 2 probability, needs more understanding. Usually many generations. Buy one in Wang Houxiong and read it yourself. Ask if you don't understand. The main thing is to return to teaching materials. This is how I study biology. More than 80 at a time. You must read more wrong questions. These methods are recommended for you to use in summer vacation. I am not afraid of poor grades in my first year of high school. In a summer vacation, I can make up for everything except English and Chinese. The key is whether you have perseverance. I was always in the bottom 15 of my class when I was a senior one. I once got the fifth from the bottom. You look terrible. Now the class is in the top ten. Stabilize around the results of heavy books.