This is the number one tenet of getting good grades: always, always, always pay attention in class. Here's a whole bunch of reasons why:  You might miss some important information. Plenty of teachers talk about tests and quizzes in class. If you're not paying attention, you could miss the answers. You could get bonus points. Most teachers reward students who are active and participating with extra participation points. This could be a sizable chunk of your grade. Paying attention in class makes the homework a million times easier. You'll have much more free time breezing through your homework at night if you've already spent the time in class thinking about it. It makes tests easier, too. If you've already spent an hour that day in class engaged, you have to study that much less. Sometimes your grade will lie on a cliff between a regular whole letter and a plus or a minus, like a A- and an A, or a B+ and an A-. In many cases, the teacher will take into account if you're a "good kid" and if he or she likes you. The more you pay attention, the more likely it is your teacher will give you the benefit of the doubt. If you do the homework, the readings, and pay attention in class, there's almost no way you can get bad grades. Make sure you don't slack off because a certain assignment is "just graded for completion." There is no point in doing homework if you aren't going to do it right. The information will be useful later on for the tests or final exams. Make homework time fun. Turn up the music and have some snacks handy. If that doesn't work, reason with yourself. Remember that teachers have to do the same amount of work you do but for all of their students. They only assign homework that is necessary for you to learn the material. Take all of those loose papers and notes of yours and organize them. When you're more organized, it's easy to find exactly what you're looking for, streamlining the studying process and avoiding frustration. Here are a few ideas:  Invest in a few small binders (multiple small binders...

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Write a summary of the previous text in Chinese:
课上集中注意力。 认真做作业。 整理。 营造舒适的学习环境。 熟悉每门课程的课程大纲。 给自己设定高要求。 每天晚上安排一定的学习时间。 做好笔记。 找个辅导老师。