That you haven't had your teeth cleaned in a very, very long time.
Google Calculus seeking children's tutorial---thats what i did to be able to help my 11 y/o with homework. *I forgot that crap immedietly
If it were simple it wouldn't take 3 pages of paper to do 1 problem. Do you need help for school or are you trying to help someone? I am just wondering because it isn't gonna be something that is simple to figure out. Sometimes it requires a study group to get through a calculus class.
essentially, it involves measuring rates of change and describing them in equations