What do you think this word means?

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Inflation in the cost of living (2021) was estimated to be about a 7% rise.

If "shrinkflation" is happening at the same time, is the unit cost for those shrunk items actually raised even more than 7%?  Let's find out.

The activity: Shrink-flation.pdf

Mardi Gras, 2022

Tuesday, March 1, 2022, will be the day before Ash Wednesday and the start of the season of Lent.  Mardi Gras is a last hoorah and is celebrated throughout the world with feasting, partying, and general indulgence. In New Orleans revelers throw and collect purple, green, and gold beads.

Students get a chance to examine the monetary and environmental cost of this bead exuberance with our unit pricing and recycling activity.

Crazy Twos (Two to the…s)

Updated for 2022!


Let your students practice manipulating exponents. Multiplication, division, roots, powers of powers.  This powerful activity asks them to do some impressive mathematics ... in their heads.

Powers of Two

We give students values of 2 to the exponents 1 through 30.  Powers of Two

February 22, 2022

Why do you suppose we are posting this date as a topic for YummyMath?

What do you think is so special about this date?

Does this happen often?  When might a similar day occur?

Winter Olympic Activities (7 activities)

Curling - Friction, score-keeping, trajectory and weirdness are the main concepts in this activity.  Curling is not a well-understood sport but the science and strategy are easily understood and enjoyed.

Big Air Snowboarding - Some of your students may be officianados of snowboarding. Using this activity could be an opportunity to let those students shine.  We look at the orientation of regular and goofy snowboarders and how their tricks are described in rotation direction and degrees.

Valentine’s Day (11 activities)

Sweetheart candies are back - NECCO went bankrupt in 2018 and there weren't Sweetheart candies the next year.  But they are back now and made in Ohio instead of Massachusetts. How many dollars worth of sweetheart candies used to be sold each Valentine's season? Students practice problem solving, critical thinking, and number sense reasoning? 6.RP, 7.RP, N-Q

Where have all the flowers gone come from? - Sunday, February 14, 2021, is Valentine's Day.  Start the "love hoopla" with this graphic (from about where all of those flowers come from. What fraction of these roses are shaded red?  The red ones symbolize flowers that come from Columbia or Ecuador.  What fact is this graphic of roses demonstrating?  What other ways could they have shown that fact? 4.OA, 4.NF, 5.NF, 6.RP.3, 7.RP