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Median age of country populations
Median age of country populations

Interesting map! Why median? What are the implications? https://statisticstimes.com/demographics/countries-by-median-age.php Demography is the study of populations. Scientists try to look at the big pictures of our world, its populations,...

Number Sense Math and Social Studies Grades 6–HS
Earth's perihelion with the Sun
Earth's perihelion with the Sun

On January 4th, 2023, Earth will be as close as it gets to the Sun during its orbit. Shouldn't that make this the warmest time of the year?...

Algebra Math and Science Grades 5–HS
How many feet of lights should I buy for my tree?
How many feet of lights should I buy for my tree?

Check out our Christmas Tree! We need to buy lights for the tree. Without calculating, guess how many feet of lights we will need. What information would help...

Algebra Number Sense Grades 6–HS
Do I have enough wrapping paper?
Do I have enough wrapping paper?

In this problem based activity students first guess and then try to calculate whether they will have enough paper to wrap this present without taping pieces of wrapping...

Algebra Number Sense Grades 6–HS
Whole lot of cookies
Whole lot of cookies

This activity has been updated -- See the updated activity HERE

Algebra Number Sense Grades 3–5
Lots of Cranberries
Lots of Cranberries

 The harvest must be nearing completion now and growers are selling their product to make cranberry juice, jelly, sauce, and of course, fresh berries in time for...

Geometry Math and Food Grades 5–8
How big could this mid-term election be?
How big could this mid-term election be?

Will the November 8 th 2022 election bring record number of voters to the polls? Students get a chance to understand what the usual percentage of voters is,...

Number Sense Math and Social Studies Grades 5–8
Inflation and the cost of gasoline
Inflation and the cost of gasoline

In 1980, one gallon of gasoline costs $1.22. Today's prices are a lot higher. Is that because the price has gone up or because in 1980 you could...

Algebra Number Sense Grades 5–7
What is Artemis 1 and when will it launch?
What is Artemis 1 and when will it launch?

Credit: (NASA/Joel Kowsky) 50 years ago we landed on the moon. We've established a space station and flown astronauts and guests to live there. Private industries have created...

Number Sense Geometry Grades 5–HS
Hexadecimal coloring
Hexadecimal coloring

Probably most of us have heard of and even used hexadecimal color codes. Don't you wonder why their number descriptions really make sense? In this activity we first...

Number Sense Geometry Grades 5–HS
Gauss and our star of stars
Gauss and our star of stars

How many stars are in this image and how did you count them? For Adventurer members we have a teaching suggestions and our solution sheet.

Number Sense Geometry Grades 3–7
What time should I wake up?
What time should I wake up?

I'm going to surprise my mom with breakfast in bed for Mother's Day. She wakes up pretty early. When do I have to wake up to pull this...

Number Sense Math and Food Grades 3–6