Drivers ed. Is it necessary???????????

Drivers ed is it necessary I don't think so i attended lake Chevrolet the first day of class we were instructed that we had to show up on time if we were any bit late we would be counted absent but the instructor was never there on time she was always walking in late with food saying take out your text books and start reading while she stuffed her face and when I say never I am not exaggerating the only day she was there on time was that first day when she told us about not being late also thew fact that she really never talked us through what we were learning she would just tell us to read then she would have a guest speaker come in and talk to us she spent more time won her computer than teaching and when we would take tests beings that she is a teacher at clear lake school she knew some of the students and she would talk to them during the tests which was very distracting and kind of annoying  plus very disrespectful and if something was not clear on the tests she would tell us to figure it out on our own  the tip of the iceberg that really set me off was the fact that we were parked in front of a TV and made to watch a video as a babysitter while she left the building completely and she used this time to get herself something to eat or go to buy a car which is very unprofessional i do not believe that the classroom part of the drivers ed should determine whether you drive with the D.O.T it should be determined by the driving performance considering I learned almost nothing new from the classroom portion so is drivers ed really as important as people think