Every 2 points of EDU raises your units' TL (Tech Level) by 1, allowing you to equip more advanced equipment in the lab, making them more effective in every way.
Valid EDU levels are 22 / 42 / 62 / 82 / 102 / 120. (TL71, 81, 91, 101, 111, and 120, respectively, for level 60 units.)
