# Category: Number Sense

## Alarming ice cracks on Brunt Ice Sheet in Antarctica

A new, fast-growing ice crack is forcing the Halley VI British research station in Antarctica (shown above) to be moved.  Fear of a huge break-off from the ice sheet is alarming not just to the scientists on the station but to…

## Saint Patrick’s Day, March 17th

Green, green river – They’re doing it again. In Chicago, the local plumbers union “dye” the Chicago River emerald green.  Students learn what PPM (parts per million) means and  attempt to figure out how much dye is used to sufficiently color…

## New baby giraffe

Willow weighed 125 pounds at birth and was 6 feet 1 inch tall.  She will grow to her adult height of around 14 feet tall in only four years! How big would you be if you grew at her rate…

## In honor of Presidents’ Day find out about President’s pay

You can’t run for President now, but heck, 2036 is right around the corner. Being President of the United States will be quite an accomplishment and a ton of work.   But, how is the pay?  Does the job pay…

## Sweetheart candies

Here’s some more Valentine’s Day fun.  How many dollars worth of sweet hearts candies are sold each Valentine’s season?  What more could kids want than Sweetheart candies, problem solving, critical thinking, and number sense reasoning? Enjoy!

## Have a heart

Clicking on the image above will show the heart larger in a new window. Canstruction® is an event hosted in more than 150 countries throughout the world to demonstrate “innovation, hunger relief  and collaboration”.  Canstruction has raised more than 40 million…

## Chocolate heart-shaped raspberry cake

Students calculate base area or volume of cakes made from 2 cake pan sizes and observe how the volume of the cake changes with the increased pan size.  This is an activity intended to demonstrate that the volume increase is…

## Super Bowl cheesy pretzel poppers

… A little more delicious work for the Super Bowl.  Students follow a recipe that involves “cutting the cheese” block, figuring how many servings, estimating how many times they need to multiply the recipe by to make enough pretzel bites, and…

## Big Bucks

Giancarlo Stanton and Wayne Rooney signed big contracts recently, paying each of them millions.  Lets take a look at some of the world’s biggest sports contracts from the NBA, NHL, NFL, MLB and European Football (what Americans call soccer).  We often hear…

## Getting a new iPhone – which plan should I choose?

I want to get an iPhone8 and maybe change my service plan.  Which of the above plans should I choose? Student pick one plan and consider the cost of the phone and plan over time.  They make tables, graphs and equations.  Consider…

## Civil rights marches, how do you count a crowd?

On October 16, 1995, perhaps a million black men gathered for the Million Man March on Washington.  This was 32 years after Martin Luther King, Jr. gave his historic “I have a dream” speech at the Lincoln Memorial to 250,000 civil…

## Possible activities in honor of Martin Luther King, Jr

Time lines for life and work of Martin Luther King, Jr. – Two timelines that show the rate and spacing of progress. One timeline about events and accomplisments of Martin Luther King, Jr Second timeline about the progress made in America, so…