Method 1: Admit your mistake to the teacher and write a letter of guarantee. Method 2: first admit your mistake to the math teacher and let the math teacher help you. Method 3: Ask this teacher's favorite classmate for help. Method 4: Find the principal, provided that none of the above methods works. Method 5: Ask your parents for help, provided that none of the above methods work. Method 6: find the director of education, provided that none of the above methods works. Method 7: find the mayor, provided that none of the above methods work. Method 8: Find the county magistrate, provided that none of the above methods works. Method 9: Seek the Governor, provided that none of the above methods can work. Method 10: Buy a new book and notebook. Notebooks are easy to buy, but books are not. You can buy it from your old classmates, but the Chinese teacher will definitely kill you, so I suggest you follow 1, 2, 3.