Weekend Fun :: Why are teachers stressed

Note: I received the below photos/scans in an email forward. These are not photographed/scanned by me. The copyright and credit of the photos/scans remain with the original photographers/scanners. If you are one of the original photographers/scanners, please let me know; I'll very happily link back to you. And oh yes, if you are one of those teachers, I guess I have expressed your stress nicely here :)