The physical method is: fully understand the formula in the book, and never let go of some simple formulas, fully understand the principle of the formula. Some classic examples must be copied in the notebook. Don't copy all the wrong questions in your notebook. Just choose the classic and give a very detailed explanation. And learning knowledge so seriously means asking the teacher, but you must think for yourself and then ask by chance. You can also consult an online expert.

The method of chemistry is simple: recite a word and give as much as you can. Write it down if you don't understand it anyway. If you have a huge chemical idea, it will be easy for you to learn chemistry in the future. However, the process is a bit bitter. I memorized it and forgot. Forgot to recite again. Anyway, junior high school has plenty of time.

Mathematical method: find some examples related to the formula to remember the formula. Some classic examples must be copied in the notebook. Don't copy all the wrong questions in your notebook. Just choose the classic and explain it in detail. However, you don't have to think about the principles of mathematical formulas. This is not something you can do. Just remember the formula. 120 is not a problem because the math score in the senior high school entrance examination is the foundation. If you want to go to 130, you should know the last two questions of the simulation questions in each district in the past four years and explain them in detail.

Pure hand tour, hope to adopt!