Nothing, first of all, you have to believe in yourself! Keep your edge and reduce the time you spend attacking science in political history. Clear the basic formula, listen carefully in class and do your homework first. Although these truths are often said, they are all true! Mainly books. Do a good job in preview and review. Review early. No, take the initiative to ask, don't be afraid of losing face! What's more, what's so shameful about it? Students will have problems. What else do they study? Yes! After that, do a good job, make a corrected copy, and often take it out to have a look ~ Good luck! I just started my senior one, so you will succeed!