Subject of the week is "measurement". Precision. Accuracy. Percent error. Distance. Mass. Density. We've been doing a lot of measuring, which means we've been using a lot of metric rulers. Most of them aren't fancy. Most of them are the rainbow colored plastic ones from Target. Nineteen cents each if you watch the sales.
Somehow, in a bit of high spirited physics lab, one of my students managed to break one. He was mortified. He didn't mean too. He was really, really sorry. He said he really wanted to pay for it, pulled out his wallet and handed me a dollar bill.
As luck would have it, I'd been selling a lot of 50-cent composition/lab books, so I had a pocketful of quarters. I assured him that it probably was not worth nearly that much, and gave him 50 cents back. We're even. We're friends again.
I wish I could have that young man work a mindmeld with whoever stole the high-end electronic balance from the counter, sometime between noon and 4 on Wednesday.