A "mad" teacher is one who has got to scream to the sky to take all that anger out of them! That way, they can calm down! A "mad" teacher usually gets stressed from students misbehaving just so they can aggravate the teacher that's trying to help them out in life and save their future! They make the teacher want to give up on teaching them because it's not worth it sometimes! Students learning all the time would make that teacher smile!