Do you ever come across a Greek symbol in your reading and think, “now what does that stand for again?” Professors and other experts at the University of Nottingham have made a series of YouTube videos that will (hopefully) jog your memory. Their site is called Sixty Symbols (I wonder what they’ll do when they find more than 60 symbols?).
They also may make nice descriptors for those symbols you cover in class. You can also embed the videos in an online course shell in the appropriate topics.
Here’s ∞ (infinity) for your any level of math class after the first discussion of interval notation.
And j (for imaginary numbers, which is i in many U.S. math texts).
Or how about ω (angular velocity) for that Trig class you’re teaching?
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