I am doing my math credential, but only writing paper for my credential courses for now. Even though it's called math single subject credential, basically I am only writing paper and observing students in school. So I decided to review my math for the summer just to remember what I have learned in the past, especially for harder level math such as Calculus and muti-variables. To be honest, math is really difficult. It's not easy to remember everything that I have learned. I have made up my mind, review math for the summer.