As the students studied the harmful teacher

When I was at uni, we had one lecturer on descriptive geometry. The man was so dedicated to his work that he was it does not matter that you spent several sleepless nights to make 15 huge drawings. If suddenly he noticed a tiny flaw, took a red pen, crossed out everything and wrote: "Redraw!".

Oh, how he tortured the already tortured students! He was many times asked to use a pen instead of a pencil, but all attempts to convince a hard-nosed teacher turned around failure. But once one of the students found a solution — right on his brand new car scratched a cross and the word "Repaint!".

Surprisingly, it worked. Bad teacher is really postponed red pen aside and took up the pencil.

via factroom.ru