So I was teaching. Inner city school. Kids are generally great, but the issues I had to deal with were incredible. 8 or nine kids parents in each class were addicts. Several living in foster care. I teach 12 to 14 years olds and have had police come into my class several times. Kids I teach have been arrested for drug use, prostitution, assault, unlawful confinement. I kid you not. At home one night planning for the next day and it suddenly hit me. I can't go in tomorrow. I NEED a day. I now have the drive to school to get the current on call teacher list. It's night time. Get stopped for speeding. Cop takes one look at my face and let's me off. (she was an ex-student!). Get in the school and start calling. As soon as I say the name of the school they say “sorry, no”. It's 11pm and an hour later before I get a “yes”. I've worked in easy schools too, but before you say teachers, “only work 5 hours a day” or “they only work 10 months of the year.” Or whatever, think about what it might be like to feel the rational stress of working with kids you care about and not being able to help them all.