Tag Archives: rational numbers

There are unshareable sizes?

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?