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Snail Power

10/12/2018

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This post contains information related to my presentation, Snail Power, at the NWAIS Fall Educators Conference on October 12, 2018.

Snail Power is a prealgebra mathematics lesson about proportional reasoning and making mathematical comparisons. In the lesson, students collect data about the pulling strength of a land snail by (humanely) connecting it to a pulling harness. We then compare the strength data for the various snails, and discover how much we humans could pull if we were, relatively speaking, as strong as a snail.

In all fairness, there's a lot of overhead to this lesson. Working with live animals -- and caring for them in the "off season" -- requires ongoing attention that will make this lesson prohibitive for most teachers. Plus, there are probably hundreds of activities that could teach the same mathematical content.

However... I have never taught a lesson that brings more delight and energy to my classroom. This lesson is a show-stopper that students will remember and talk about for years!

Here's a link to a shared folder that contains both the conference presentation slides and the student-facing presentation.

For those who would like to learn more about keeping snails as classroom pets, I recommend the websites www.petsnails.co.uk and www.molluscs.at.

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This work is copyright Jason Ermer and released under a Creative Commons Attribution-NonCommercial 4.0 International License.