It's never too late as long as you start studying. Moreover, there are many such examples. So-and-so suddenly began to study and made extraordinary efforts, rushing directly from more than 200 students in the whole grade to the front 100. Nothing is impossible as long as you work hard.
Now in the third year of senior high school, communicate with the teacher first, let the teacher notice you and know that you are going to start studying, so you can concentrate on your heart and not let you go as before. Then ask to change seats. You need a patient and good deskmate. This requires the consent of teachers and classmates. If you don't agree, you need to bother her more attentively and understand all the questions you can't. Remember that because you didn't study in Grade One and Grade Two, your foundation is very shaky. When listening to other people's lectures, you must thoroughly understand the problem.
Maybe after studying for a while, your exam results didn't meet your expectations. Never give up at this time, learning can't be immediate. At this time, you need to make a plan to see which subject is your weak subject, and then make a breakthrough. As long as you stick to it, you will get unexpected results. Your plan must be targeted. For example, when I was in senior three, English was always my weakness. Before I get up in the morning and go to bed at night, I will spare ten minutes to recite words, and I will go back to my dormitory at night. In fact, after washing, I can still have time to practice some comprehensive topics, because it is difficult for me to improve my math. I feel that doing more comprehensive problems will make it easier to improve my grades than math.
In the final sprint stage, you need to keep a good attitude, or just like that, stick to your plan until the college entrance examination.