My favorite subject is math. It is my favorite because I am good at it. I never have to work hard at it and I always get good grades in tests. I am happy that I was born with(天生具有)a clear-thinking brain(头脑). The great thing about math is that there is not much to remember. In other subjects, like history and geography, you need to remember a lot of things. Though math is easy for me, some of my friends think it is difficult. They often have difficulties with their math. I often help them with their math at school. Math is easy for me, so I don't have to spend very much time on it. I have more time to study other subjects. But some of my classmates can't finish their math homework. It often makes the teacher angry. I feel sorry for them. I think I should give them more help.