Tag: 8th

Stock Market headlines – Biggest losses since 2008

Biggest losses since 2008 – The Dow is measured in points but this decline can also be measured in the percentage lost.  Which way was the Dow being measured when this headline was produced?  Which method makes more sense? Wasn’t the initial value of the Dow much lower in 2008?

World record Snickers Bar

This World Record Snickers Bar was created in late January at the Waco, Texas Mars Wrigley Plant. What proportions would be an accurate cross sections of this monster bar? How many Mars Wrigley workers would this feed? How are your calculations different from what was published? How must their calculations have differed from yours?


This activity is a investigation intended to get students and teachers to loosen up a little and appreciate how just considering a situation might lead you to a very reasonable approximation.
Too often students think that there is only one answer that is right and that the method for approaching that solution is also limited to the “correct” approach. Surely this fear of experimenting and guessing leads to math anxieties and the fear to reason and experiment.

Hoarding stopped!

A Danish market found an interesting way to limit hoarding of hand sanitizer. How much are these costs in your currency? What is the unit price on these bottles? By how much (what percent) was the price increased? Is this…

Weird and spooky puzzles for April Fool’s Day

This day is known for pranks and puzzles.   Try one of these 4 activities on April Fools Day. Ask students to analyze where I made my mistake        PerplexingProblem.pdf For members we have solutions. PerplexingProblem-solution.pdf      …

Pascal coloring and modular math

Clock math, 1,2,3,4,5,6,7,8,9,10,11,12,1,2,3,4,5,6,7… is modular math. Let your students learn about the usefulness of modular math as they color and explore Pascal’s Triangle. Very pretty math!

Celebrate Saint Patrick’s Day (3 activities)

Finding 4-leaf clovers! Shamrocks in Ireland are actually be 3-leafed white clover, trifolium repens. If you are lucky, you can sometimes find a four-leafed clover.  How rare is finding a 4-leafed clover?  How hard do you have to look?  What…

The R-naught number of the coronavirus

We’re still learning about the coronavirus and its ability to and tendencies toward infection and spread. Students learn about the R-naught number which is a measure of infectious growth. Real-world mathematics!

Which gasoline is the cheapest?

A comparison of gasoline in Greece, priced at Euros per liter, and gas in Massachusetts at dollars per gallon. Price and liquid volume conversion using unit fractions.