Enough about me. Let’s get back to overthinking our teaching, shall we?
This came in the mail today.
Seems innocuous enough. No goofy combination discounts. No bait and switch. Just a straight-up buy one, get one free offer.
But wait. Buy one what?
One “shareable-sized flatbread pizza”.
Contrary to what we have been teaching kids in middle school classrooms, Cosi is suggesting that there are sizes too small to share.
There are units of which we cannot take a fraction.
The rational numbers are not dense.
Who knew?
Overthinking my teaching 
Given how well messing with mathematics did for Borders, Cosi’s marketing folks best watch themselves. On the other hand, not being a fan, I’m all for their attempt at unilaterally dictating what sizes are too small to share. The sooner another lame, overpriced chain bites the dust, the better. 🙂
Thank you for pointing this out. I will be using this in my class next year to spur on discussion about the way we talk about mathematics. Also, this may help my students understand why I am so nitpicky about certain definitions.
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