A few weeks ago I may have said some unkind things about graphing calculators and their place in these modern times, but that was before I saw this version of Portal. That’s right, someone has released a version of Portal for the TI-83 Plus and TI-84 Plus graphing calculators. Games are nothing new to the world of graphing calculators, but this makes me want to go back and not pay attention in math class all over again.