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How many gumballs are there?
How many gumballs are there?

Gumball Machine Problem from Brian Marks on Vimeo This problem is a little puzzle to get your students thinking, estimating, and calculating. We've given you a pdf file...

Number Sense Geometry Grades 5–HS
Willy Makeit or Betty Wont
Willy Makeit or Betty Wont

I have to go to the bathroom pretty badly. I have to admit that I have been holding it in for a while. Finally! I see a bathroom...

Number Sense Geometry Grades 3–5
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 4–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 4–HS
Where should I drop my puck
Where should I drop my puck

Act 1 - Give students time to view the game board above or give them our one-page activity. The above picture is larger when you click on it....

Algebra Number Sense 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 2–6
Shooting for Three
Shooting for Three

The NBA court has a 3-point line that separates how many points a player will earn for his team by making a basket from outside of that line....

Algebra Geometry Grades 6–HS
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 2–5
How big of a crepe can you make?
How big of a crepe can you make?

At Costco you can buy this huge tub of n utella . It contains nearly 7 pounds of chocolaty-hazelnut spread. We use n utella to make banana/n utella...

Algebra Number Sense Grades 4–7
April Fool's Day fun
April Fool's Day fun

This day is known for pranks and puzzles. Try one of these 4 activities on April Fools' Day. Ask students to analyze where I made my mistake. CCSS:...

Algebra Number Sense Grades 3–HS
Mardi Gras, 2023
Mardi Gras, 2023

Updated for 2023! Tuesday, February 21, 2023, will be the day before Ash Wednesday and the start of the season of Lent. Mardi Gras is a last hoorah...

Algebra Number Sense Grades 4–6
Beijing Olympic Schedule 2022
Beijing Olympic Schedule 2022

The Winter Olympics begins this week in Beijing. Wikipedia had this schedule of events. We think that there is a lot of information missing and apparent in this...

Number Sense Sports Grades 2–HS