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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
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
Indigenous Peoples or Columbus Day
Indigenous Peoples or Columbus Day

When Columbus landed in Guanahani (renamed San Salvador, Bahama Islands by Columbus), he began the European settlement of the New World. Guanahani was inhabited by the Taíno people...

Algebra Geometry Grades 4–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
Hurricanes again
Hurricanes again

Updated In this updated hurricane activity, we've ask students to examine the Saffir-Simpson hurricane wind scale and consider what other elements besides this ranking may contribute to the...

Algebra Math and Science Grades 5–HS
What do you know about the Hawaiian islands?
What do you know about the Hawaiian islands?

We’ve been watching news about the extreme wild fires, draught and winds that have devastated parts of the Hawaiian Islands. Let your students explore Hawaii and better understand...

Algebra Number Sense Grades 3–7