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December 21, 2020 - Great conjunction

Algebra Number Sense Geometry Math and Science Current events
Right now, just after sunset, in the southwest sky, you can check out the planets of Jupiter and Saturn as they get closer and closer to each other. They are millions of miles apart but they app...

Extreme weather 2020

Number Sense Math and Science
Because of climate change, we've been having too many extreme weather events. There have been unusual droughts and heat in the West, an increased number of hurricanes, severe flooding, and high ...

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 ...

How much water should you be drinking?

Algebra Math and Science Math and Food Ratio and Proportion
As we are outdoors more and temperatures are rising, it might be a good time to look at hydration. A healthy requirement for fluids can't really be the same for everyone.  Surely the amount ...

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...

May 27th launch from the U.S. again

Geometry Math and Science Math and Social Studies Current events
May 27 scrubbed because of weather. Successfully launched Saturday, May 30th, 3:22 pm EDT.  Dragon is on the way to the ISS now. Wednesday, May 27th will be a momentous day for space tr...

Microns and Masks

Algebra Number Sense Math and Science Math and Social Studies Current events Ratio and Proportion
  How big is one coronavirus? How big is a micron? How well do these masks protect against the virus? What can you observe about the size of particles mentioned? Why are we wearing masks?

Is there much of a difference between 99.9% or 99.999%?

Algebra Number Sense Math and Science 3-act tasks Data and probability
Use our present need for cleanliness to engage your students.    Does it really matter whether you kill 99.9% of the bacteria or 99.999% of the germs? In this activity, we'v...

Gonna be a Leap Year

Number Sense Math and Science Data and probability
  By George C. Baxley  This year we will add the 29th of February to our year?  Why do we do that?  How can you tell?  What if we didn't add a day every 4 years? Stud...
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