"Really Tough Teacher" joke
A school teacher injured his back and was required to wear a plaster cast around the upper part of his body. It fit under his shirt and was not noticeable at all. On the first day of the term, still wearing the cast under his shirt, he found he was assigned to the toughest class in the school.
Walking confidently into the rowdy classroom, he opened the window as wide as possible and then busied himself with desk work.
As he worked at his desk, a strong breeze from the window made his tie flap around. He kept trying to rearrange it and finally, getting so annoyed with the flapping, he grabbed the stapler from his desk and stapled the tie to his chest in several places.
Discipline was never a problem in the class from that day on.
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