Teaching 10th and 11th graders how to use a vernier caliper yesterday. I explain that each small line is .025 of an inch. So if you have 3 little lines, how much is it.? " I donno" Ok .025 plus .025 plus .025 equals ? " uhhhhh" Hmm maybe its the point 0 thing confusing them. Whats 25 plus 25 plus 25? Uhhhhhhh, Ummmmmmm. God help us all. Make sure you're dead before they have to take care of you.
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