Number Sense

Canstruction

Act One:  Take a look at the pic. What questions come to mind? Just before Thanksgiving there is an annual demonstration at the Winter Palace in the World Financial Center of New York City.   Canstruction is a celebration of…

Going back to school

In this investigation students calculate the percentage of the U.S. population (current and historically) that are enrolled in K-12 schools. They are asked to draw conclusions from these variations. Finally, they use their calculations to predict the number of enrolled…

Weather extremes

This year has brought torrential rains to Texas after years of severe draught. February was the coldest month ever in much of the midwest and Northeast US.  Pakistan and India have experienced extreme and deadly heat waves. Use the open number line and…

How much does it cost to go back to school?

Back to school spending is huge and students might not appreciate what it costs to send them back to, essentially, their job of learning.  In this activitiy students decide what equipment and supplies are necessary, estimate how much that will…

In the Cloud

I want to find a way to keep my photos, documents, videos and music in a place that is safer than on my computer.  If my Macbook Air melts, where can I keep my irreplaceable files so that they aren’t…

Shooting stars coming soon, 2015

Conditions will be favorable for excellent views of the Perseids meteor showers in early mid-August.  Let students read charts, analyze data, work with percent of moon visibility at each phase, and understand apparent magnitude in the night sky with this…

Should I buy the BIG one?

 Let your students decide if the BIG one is a fair deal.  Click on the pic to enlarge and post on the wall.  Have kids a pick a sandwich.  Which size will they get?  Which size is a better deal?…

Wow! Only 10 cents!

All the ice cream that you can eat for only 10 cents!  Wow, that’s a great deal!  Or is it? The history of the Dairy Queen franchise began with this ad in Illinois in 1938.  I know that 10 cents…

Free Flights?

This can’t be right!  If my flight cost $200 and I stayed for 10 days it would be free.  Right?  You can kick off this activity by asking students to think about where in the world they would love to travel…

The spread of Lyme disease

With the start of summer and wonderful outdoor activities, it might be good to examine the growth of Lyme disease occurrences in the United States.  The Center for Disease Control and Prevention (CDC)  has a wonderful map that you can…

Jock tax

Great professional athletes make a lot of money. In November slugger Giancarlo Stanton signed a thirteen year contract for over $325 million with the Miami Marlins!  Did you know that professional athletes have to pay an amazing amount of federal, state,…

Can you create a fireworks display on your calculator?

Let your students experiment with their graphing calculators to create a nice fireworks display?  We’ve written a brief activity that questions students about manipulating parabolas, adjusting their calculator windows, and helping them celebrate whatever. Or consider using Desmos or Geogebra to create these fireworks. Enjoy!

Dog years

My dog, Jorge, has just turned 10 years old.  He seems like a puppy to me but I wonder how old he is when compared to a human’s age.  He’s definitely not 70 years old. Students analyze charts and graphs…