Interpreting math expressions is one of those things that seems simple until you get into it. The first problem is correctly lexing the input — a term that means splitting into tokens.

This post explains what a Python module is and how to use it to drastically extend the capabiltiies of your code. Plus: how to make your own!

Jefferson Middle School fifth-grade math teachers, Baker, Mindi Lydell, Adam Mason and Stacy Monroe are piloting the recently released Common Core Standard math module in their classes. The new Common ...