If a prerequisite for E&M is Multivariable calculus, why is it offered in high school (without that pre-req)? Is the High School E&M equivalent to physics 2 in college, and if that is so, Physics 2 is still offered before Multivariate calculus. Can someone clear this up for me. Am I getting two different courses confused all together? I will be taking Physics AP next year, but I am very nervous about it as I am taking my first Calculus course along with it as well (BC).