As a post-Calculus introduction to Julia and other similar mathematical computing languages, this doesn't seem like a bad thing to do. Understanding how to use one of these at a high level is pretty useful, and any time I have to do real math for work, Mathematica makes things a lot easier. R and Matlab are also big in the space, but iPython notebooks with SymPy might also work (although SymPy is comparatively underpowered in comparison).