I graduated HS in 1996 and just started going to college this past fall. It was terrifying the first day back, but I've found the experience completely rewarding. Being 36, working a full-time job, and going to school full-time can be exhausting. Somehow I managed to get a 3.833 gpa the first semester, and if I can do that, anyone can.
Also, in regards to math, I took a remedial class the first semester and it was a great refresher for everything I forgot over the past years.
@brendan: For me, looking up or down with just my eyes is only useful for slight sight adjustments. Since I am often wearing glasses, looking at anything near the ground or above my head with just eye movement would leave me looking below or above my glasses, and quite blind to (or at least with a very fuzzy image of) what I am trying to look at. I wonder how many inverters are people that usually wear glasses?