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

Algebra Number Sense Grades 4–HS
Leslie's Yummy Pumpkin Pie
Leslie's Yummy Pumpkin Pie

Every year more and more people come to our house on Thanksgiving morning for my (Leslie's)famous pumpkin pie and a hike in the nearby woods. This year 23...

Algebra Number Sense Grades 3–5
Heating with wood - What's a cord?
Heating with wood - What's a cord?

Do you know what a cord of wood looks like? What size stack is that? What's a thrown stack? What's the dog's name that is standing in front...

Algebra Number Sense Grades 4–HS
Nobel Prizes
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...

Algebra Number Sense Grades 5–HS
More Population Pyramids
More Population Pyramids

The population pyramid above shows the distribution of the World by ages and sex for each continent. How can that information help you put your vision of the...

Algebra Number Sense Grades 5–HS
Will this be an El Niño winter?
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...

Number Sense Math and Science Grades 3–HS
Huge Alaskan Vegetables
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...

Algebra Number Sense Grades 3–7
Lego Fireman +
Lego Fireman +

At the Toys R Us store, we saw an amazing LEGO creation. He was a life-sized LEGO fireman with a walkie-talkie, an oxygen tank and even an oxygen...

Number Sense Geometry Grades 5–HS
Autumnal Equinox 2023
Autumnal Equinox 2023

Updated for 2023! Saturday, September 23, 2023 at 06:50 UTC (2:50 am EST), will be the Autumnal Equinox. It is the time of year when an imaginary plane...

Algebra Geometry Grades 5–HS
The Moroccan Earthquake and the Richter scale
The Moroccan Earthquake and the Richter scale

Friday evening, September 8 th , a powerful 6.8 magnitude earthquake hit Morocco southwest of Marrakech. What does a 6.8 magnitude earthquake mean? How powerful was that? What...

Algebra Number Sense Grades 6–HS
Little Amal walks across the United States
Little Amal walks across the United States

With our world in so much turmoil and refugees trying to survive hardships by traveling away from their homes, the story of Little Amal is powerful, timely, and...

Algebra Number Sense Grades 4–HS
Will the Barbie movie out-perform Avatar at the box office?
Will the Barbie movie out-perform Avatar at the box office?

The Barbie Movie is still doing well in the theaters. It has only been 6 1/2 weeks since its debut. Do you think that it can out-earn Avatar?...

Algebra Number Sense Grades 2–HS