Counting Fish


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Last night my oldest son (Caleb, 5) asked if we could play Monopoly before he went to bed. I said, “Uh, no thanks.” (It was after 8 pm, and I still had aspirations to be in bed while it was still called Thursday.) He then asked if we could play the “fish game” instead. “That, my friend, is a great idea.” And with that, it …

Where’s the emphasis? Right where it belongs.


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One of the things I love about Desmos is that it allows students and teachers to keep the focus where it should be. Working on a linear approximation problem in Calculus? It’s easy to get caught up in algebraic and numerical details and lose sight of the big (somewhat amazing) picture: We can approximate a crazy curve with a simple line! (Provided …

A Good Day in Precalculus


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After struggling a bit earlier in the week, it was nice to end with a positive experience  in Precalculus on Friday. There’s nothing profound in the sentences below, but I still think it’s worth writing down, if for no other reason than increasing the likelihood that I recall some of this as I plan future lessons. Context (for the Year) We made the move to block schedule this …

Teaching vs Student-ing

(In all likelihood, this will be the shortest blog post of my blog-posting career.) I like being a teacher of high school mathematics more than I enjoyed being a student of high school mathematics. What does that say about the nature of the classroom as I’ve experienced it on either side of the desk? And what does it say about …

Try, Try Again


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Monday wasn’t the greatest of teaching days. But in teaching we have a thousand opportunities to try again. If at first you don’t succeed… Write a long blog post reflecting on what went wrong, and then go back to the drawing board. Tomorrow’s Game Plan When I taught this lesson three years ago, it lasted 40:01. I’m not kidding. (By the way, that …

The script is dead. Long live the prompt!


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Period 2 Well that wasn’t any good. Here’s a picture of the main part of my Calculus lesson from today: One example. That’s it. The central element of my entire lesson was… one example. And not even a task. Just an example. A watch-me-as-I-carefully-walk-through-every-step-of-this-sucker and make-sure-you’re-on-guard-in-case-I-ask-you-any-leading-questions example. Oh my. Granted, there was more after that example, just not a great deal more. And …