The shell method has got to be the toughest to visualize, and here’s where these demos are invaluable! Several real-life examples… nested Russian dolls, Angel Food cakes, Combos, toilet paper rolls, etc. are shown on the Shell Method Page and then (as always) there are a great collection of mathematical solids (4-part construction) in the Gallery.
If you just want to jump quickly to all the Galleries of Demos, go here.
Now, I don’t have a computer lab for my calculus class, but I have used these materials in several different ways from year to year: 1) Schedule time in a computer lab so that students can see each demo up close, 2) use a projection system, 3) have the students that have laptops bring the site up on their laptops. Almost all my calculus students have laptops now, so we essentially have a functioning “lab” if they all share their laptops.
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