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What's wrong with this picture?
What's wrong with this picture?

We've gotten used to believing what we read or see advertised. But sometimes the clerk doesn't get the sales discount right or something seems a little off. Let...

Number Sense Geometry Grades 5–6
Shrinking Toblerone
Shrinking Toblerone

New York Times photo - Credit Darren Staples/Reuters They changed it. That is so not fair ... or is it? You can check out a video news story...

Number Sense Geometry Grades 4–HS
3 winners on the Price is Right - what are the chances?
3 winners on the Price is Right - what are the chances?

Act One: Show this clip of the Price is Right program. What questions do your students have? We were wondering what the chances are of 3 contestants in...

Algebra Number Sense Grades 6–HS
Cheap-otle?
Cheap-otle?

mage from Chipotle. One of my favorite foods is a burrito. One of my favorite places to get a burrito is Chipotle . Their food is delicious and...

Number Sense Math and Social Studies Grades 4–7
Big Papi
Big Papi

What do you wonder? How many donuts make up this Big Papi tribute? What would be useful to help you figure this out? The following pictures that will...

Algebra Math and Food Grades 3–6
Are these really 70% off?
Are these really 70% off?

We ran into this sale online. Is that advertisement correct? Do they just want us to believe their math and not question what is really 70% off? Is...

Algebra Number Sense Grade 6
Pascal's Triangle coloring and Probability
Pascal's Triangle coloring and Probability

Pascal's Triangle and Probability - This activity could be used to explore the probability of coin tossing results. When the combinations get too complicated to list, students can...

Algebra Number Sense Grades 6–HS
Another year of Never Ending Pasta (Updated)
Another year of Never Ending Pasta (Updated)

Updated – 2025/2026 Olive Garden again offered a $100 pass for never-ending pasta! The 21,000 patrons who quickly (in less than a minute) bought all of the passes...

Algebra Number Sense Grades 3–5
Pokémon GO!  I should have invested
Pokémon GO! I should have invested

Pikachu Pokémon GO is all the rage. News reports show people glued to their smart phones as they travel to nearby landmarks where virtual critters appear and need...

Algebra Number Sense Grades 4–HS
10 Million nematodes
10 Million nematodes

Nematodes Grubs are killing my grass. I don't want to put poison into the ground. What can I do? There are tiny roundworms called beneficial nematodes. They can...

Algebra Number Sense Grades 4–HS
How high can a gymnastic score be?
How high can a gymnastic score be?

Gymnasts have just successfully competed in St Louis, Missouri for positions on the USA Olympic team. As you watch their performances don't you wonder how their scores are...

Algebra Number Sense Grades 4–6
Expensive face creams
Expensive face creams

Who knew that creams for your face could be so expensive! I'm going to have to rethink what to buy for my mom. Which of these high priced...

Algebra Number Sense Grades 4–7