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How much pee is in this pool?

Number Sense Geometry Math and Science Funny Wow factor
After chlorination, it has been hard to measure the quantity of pollutants in pool water.  A Canadian chemist, Xing-Fang Li, has found a marker for urine that chlorine doesn't disguise....

Just ONE hot dog

Algebra Number Sense Math and Science Math and Food Sports Ratio and Proportion Data and probability
A newly released nutritional and environmentally sustainable study shows that eating just one hot dog can take 36 minutes off your total healthy lifespan. How many would you have to eat to lo...

AQI - Air Quality Index

Number Sense Math and Science Math and Social Studies Current events Data and probability
The AQI is a measurement of how much particulate matter, dangerous ozone, carbon monoxide, nitrogen dioxide and sulfur dioxide there is in the world's atmosphere at any one time and place. This W...

It's tick time again ... and Lyme disease

Algebra Number Sense Math and Science Math and Social Studies Data and probability
With the start of summer and wonderful outdoor activities, it might be good to examine the growth of Lyme disease and to recognize its carrier, the deer tick. Will this be a record ...

Shoprite's solar energy goals on the African continent

Algebra Geometry Math and Science Math and Social Studies Current events Data and probability
  Shoprite is the largest supermarket chain in Africa.  The company is presently engaged in increasing their use of solar power to harness the abundant natural resource of solar potentia...

At least the days are getting longer

Algebra Number Sense Math and Science Holidays and Annual Events Current events Ratio and Proportion Data and probability
What's your guess?  How fast are the number of daylight hours changing each day?  Are the changes dramatic or subtle? Students make guesses; compute how l...

How much snow is that?

Algebra Number Sense Math and Science Ratio and Proportion
Start this activity with: What do you notice? What do you wonder? How many inches of snow produced that pile?  How much snow in volume is on top of the car?  H...

How big is this hornet really?

Number Sense Geometry Math and Science Current events
Egad !!!!   Giant Asian hornets have now migrated to Washington state and British Columbia.  Even though they are sometimes called "murder hornets" their stings aren't fatal.  The...

It might be a good year to see the Perseid meteor shower

Math and Science Holidays and Annual Events Ratio and Proportion Data and probability
Catching a productive meteor shower can be a stunning experience.  On the evenings and mornings of August 11th, 12th and 13th there could be a very good show.  A last quarter moon ...

Leslie's socially-distanced party

Algebra Geometry Math and Science
I risked infecting my friends or becoming infected myself by throwing a very small socially-distanced party.  I served baked appetizers, disinfectant wipes, and latex gloves.  I cooked whi...
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