### Math and Science

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#### How much pee is in your pool (Updated)

How much pee is in your pool? 🏊🏊 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 f...

#### It's almost summer now

How much water do you have to drink?   In this activity student develop formulas for calculating their water needs, learn about the effects of too little wat...

#### Earth Day Actions for Our Planet (April 22)

We have 16 activities that you could use for Earth Day! April 22nd is Earth Day. Help your students become activists for our planet? We have ...

#### A geodesic icosahedron, the Times Square New Year's eve ball

Image by kjpargeter on Freepik It's a gorgeous ball, covered with Waterford Crystal triangles, shaped as a geodesic icosahedron.  Every New Year's Eve it descends in Times Square to mark the...

#### What is a quantum dot?

In this activity, students work through the nomenclature to understand the possibilities of nano science and quantum dots.  Questions that are answered; How many nanometers are in a millime...

#### DST ends November 5th, 2023 - strange happenings

In this activity students try to figure out how time settings will change as they move from place to place and in the serious weirdness of Arizona and the Navaho and Hopi nations.  What variables...

#### Vampire bats + Mosquito eating bats

Ooooo. Scary!  In this first activity on vampire bats we've given lots of interesting metric and customary unit facts and asked students to relate those sizes to more familiar objects.  Si...

#### Nobel Prizes

The Nobel Prizes have just been awarded. This is the medal that is given to the winners. What do you know about the Nobel Prize?  Who do you know who has received one? Alfred Nobel was a ...

#### Will this be an El Niño winter?

The Oceanic Niño Index (ONI) started to show changes to the Pacific Ocean surface temperatures in April and May of this year.  Those temperatures are still rising which is a marker for the upco...

#### Huge Alaskan Vegetables

The annual Alaskan State Fair has just been completed. As usual, there were some amazingly big vegetables that won the agriculture prizes. Evidently, even though the growing season in Alaska is s...