The new national college entrance examination mode is 3+ 1+2. 3 refers to a foreign language of mathematics, 1 refers to one of the two subjects of physical history, and 2 refers to two of the four subjects of chemical biology and political geography. Under the new college entrance examination mode, the compulsory subject for teachers is mathematics foreign language. If you choose physical chemistry geography, you can be a physical mathematics and chemical geography teacher in the future.