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December 21, 2020 - Great conjunction
December 21, 2020 - Great conjunction

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....

Algebra Number Sense Grades 3–HS
Holiday soda displays
Holiday soda displays

The holidays are coming! We found these timely soda displays made up entirely of 12-pack of Coca-Cola products. What questions do you have? Start out the activity by...

Algebra Number Sense Grades 2–HS
The new largest Lego set ever - The Roman Colosseum
The new largest Lego set ever - The Roman Colosseum

Note: This is a remake of our 2014 and 2017 activities " How Much Does a Lego Cost? ". How much could the Roman Colossem Lego set cost...

Algebra Number Sense Grades 5–6
How much chocolate is left?
How much chocolate is left?

In this short activity, students reason and calculate what is left of these chocolate bars. The bars are the same size but are molded into different numbers of...

Algebra Number Sense Grades 3–5
2 Hiking Activities
2 Hiking Activities

How much food do you need to carry to hike the Appalacian Trail? The AT is a hiking trail that begins in Georgia and ends on Mount Katadin,...

Algebra Number Sense Grades 5–HS
Can you show that the Pythagorean Theorem works?
Can you show that the Pythagorean Theorem works?

Use this activity to help your students work through the meaning of the Pythagorean theorem. Pythagorean theorem experiences are often skill and drill work with contrived right triangle...

Algebra Number Sense Grades 5–HS
USPS needs help!
USPS needs help!

The U.S. Postal Service has been in the news lately. Does it seem like your mail takes longer to reach where you have sent it now? Do you...

Algebra Number Sense Grades 4–HS
What does the data show?
What does the data show?

When you look at the new case numbers of the Coronavirus in the U.S. and compare that with various world and national events and our present scientific understandings,...

Algebra Data and probability Grades 4–HS
How much water should you be drinking?
How much water should you be drinking?

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...

Algebra Science Grades 4–HS
How fast will my new puppy mature?
How fast will my new puppy mature?

Dudley , born 11/10/2019 Dudley has just come to live with us. He is just a puppy and he is full of energy. He's settling in well even...

Algebra Number Sense Grades 5–HS
Really stuffed!
Really stuffed!

Wow, these cookies look really stuffed! How much more "stuffed" are they compared to Triple Double Oreos, Double Stuf Oreos or even Original Oreos. Does this look yummy...

Algebra Number Sense Grades 4–HS
Coronavirus trends
Coronavirus trends

Johns Hopkins University of Medicine has a team that maintains current maps and data about the Coronavirus. They record changes and show trends of the virus activity throughout...

Algebra Math and Science Grades 6–HS