Ours do it cuz we all ask questions but they dont explain it, i remember last year is sci class i asked him if he could help me and he started yelling, and he sed "HOW DO U GUYS NOT NO THIS I SHOWED U THE OTHER DAY, and i was like no u didnt all u did was yell b/c we asked if u could repeat it then i got kicked outta class.
What?!?!?! That's just wrong. Thx god my teachers don't do that. They are very helpful most of the time. But they get to pissy and are very strict, but, it's for the greater good sometimes.... I suppose.