Number Sense

World Cup draw

This is part II of our reflections on the World Cup games.  Part I, World Cup rankings, explained and let students practice with the formula and weighting that is used to establish each country’s team rank. This second activity deals with…

California Chrome’s Lineage

Alas.  California Chrome did not win the Triple Crown.  Tonalist won the Belmont Stakes. This Saturday is the final race of the Triple Crown of thoroughbred horse racing … the Belmont Stakes. No horse has won the Triple Crown since…

World Cup rankings

In December the soccer teams with the strongest world rankings were chosen to play in the once-every-4-years World Cup. The team rankings are calculated in a pretty complex manner. How are the 32 teams selected? Students can explore the ranking…

The growth of Godzilla

Image from Kris Holt: http://www.policymic.com/articles/76357/the-scary-way-godzilla-has-evolved-through-the-years-in-one-chart The new Godzilla movie is out at theaters.  His first appearance was in 1954 when he was created in Japan and crushed Tokyo.  He appears to have grown.  Do the film-makers have him growing appropriately?  Lets…

An ounce of cola

Which is more expensive; gasoline? milk? or cola?  Students calculate the per ounce cost of each of these liquids in a story about a man doing errands.  After finding the per ounce price, students find costs of gasoline, milk and…

Cost of light bulbs – updated!

Finally updated! There’s a lot of misinformation out there about the cost to consumers of CFL and LED bulbs and the savings in energy and money that could be realized. Let your students “do the math” and realize some of the…

Mom’s matzo ball soup

Passover begins this year on Friday evening, April 22nd, 2016, with a Passover seder dinner. Passover is one of the three high holidays in the Jewish calendar and celebrates the Exodus of Jews from slavery in Egypt. Let your students…

Pizza party

In this activity students decide how to divide 2 pizzas amongst 6 adults and 3 pizzas amongst 8 kids.  Fractional pizza parts need to be drawn and considerations discussed about which fractions are greater. Students interpret a fraction as division…

Blue river

Because the Cubs just won the World Series, the plumbers have died the river blue. During the St. Patrick’s Day parade in Chicago, the local plumbers union dyes the Chicago River emerald green. Students learn what PPM (parts per million)…

Shamrock Shake

For Saint Patrick’s Day add a little nutrition math to your celebration.  In this post we look at calories, carbohydrates, sugars, fats, and proteins to decide what would be left for our day’s meal allotment after we had lunch and…

Someone ate my cake!

In this fraction operation and representation activity, students are asked to decide how much of my cake was eaten. Using fraction multiplication (or angle measure if that is where you need an activity) they find out how much someone owes…

Olympic reflection

After the games Thomas Ulsrud, Norwegian curler;  Eun-Ryung Sung, South Korean single luge  Dachhiri-Sherpa, Nepalese cross-country;  Jason Brown, U.S.figure skating The 2014 Winter Olympics have concluded.  Which country had the most successful olympics?  Three students can’t agree.  Have your students…

Too early in the day for so many choices

Dunkin Donuts is promoting variety in their mixtures of hot chocolate.  Let your students try to figure out how many ways they can create their drink as they calculate the number of combinations possible in our story of stopping for…

Highest grossing movies

Let your students develop their own ideas about compounded percent change while they have the opportunity to speak about the upcoming Academy Awards show. Worldwide box office income is compared for the top ten grossing movies of all time. Is…

Where have all the flowers … come from?

Tuesday, February 14, 2017, is Valentine’s Day.  Start the “love hoopla” with this graphic on where all of the flowers come from.  This is part of the graphic from http://visual.ly/valentines-day-facts What fraction of these roses are shaded red?  The red ones…