Calculating a half-life, the approximate time it takes for the body to remove one-half the active ingredient in a medicine, provides the real-life tie-in to this activity.

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Edited by Erik Tillema,, who teaches at Indiana University in Indianapolis, and Fred Dillon,, a math educator from Strongsville, Ohio. Manuscripts should show how math is used to solve a real-life problem, preferably in the context of one's profession, and should be no more than 300 words. Submit manuscripts through

Contributor Notes

Alyssa Hoslar,, teaches mathematics at Strongsville High School in Strongsville, Ohio.

(Corresponding author is Hoslar
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Mathematics Teaching in the Middle School
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