But if you have one of the supported calculators (TI-83+, TI-83+ SE, TI-84+, or TI-84+SE ... We’ve seen some arguments online about the price of the TI line over the years.

Just before the days where every high school student had a cell phone, everyone in class had a TI graphing calculator. In some ways this was better than a cell phone: If you wanted to play ...