If you ever wanted to know more about linear programming and how to use GLPK go check this article written by Rodrigo Ceron! He carefully explains some theory on linear programming and how to use GLPK to solve problems. I must say that linear and integer programming are very interesting topics. I should find some time to study these areas a little bit more. This article reminded me of PuLP, a nice linear programming modeler for Python that can use GLPK as its underlying solver.
Update: another GLPK article by Rodrigo Ceron! Go check it out!
