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Free Burger King for Life
Number Sense Food
Locked in a smelly bathroom for one hour and then promised a lifetime of Whopper meals in 2018, an Oregon man sued Burger King when the manager withdrew the promise. How much money should he ask for i...
6th 7th 8th 6.EE.B Number Sense burger 6.RP.A 6.RP.A.3 MP3 7.RP.A

Back-to-school Calculator Sales
Number Sense Ratio and Proportion
 Which back-to-school calculator deal saves you the most? Students work out the savings and the percent off on three real sales, then compare to find that a bigger percent off doesn't alw...
5th 6th 7th percent percent discount discount money sale 6.RP.A 7.RP.A Back to school

All you can eat for 10 cents
Algebra Number Sense Food
The history of the Dairy Queen franchise began with this ad in Illinois in 1938: All the ice cream that you can eat for only 10 cents! We know that 10 cents was worth more in the past, but was it...
8th 8th HS 9th 6th 7th 5th 6.RP.A 7.RP.A3 HSF.IF.C HSF.LE.A estimation summer inflation inflation rate money exponential growth exponential percentage change Business

National Donut Day (2 activities)
Algebra Geometry Food Current events Ratio and Proportion 3-act tasks
 Friday, June 5th, is National Donut Day.  We have 2 activities to support this silly holiday.  How much have doughnuts changed? Students become familiar with the word "torus"...
5th 6th 7th 8th HS estimation Volume 6.RP.3 7.G.1 reasoning MP1 MP2 MP3 Torus donuts donut

Joe's Tiny New York
Number Sense Art
Joe Macken is a truck driver from upstate New York. Back in 2004, when he was 41, he went into his basement with some balsa wood and started carving a tiny version of New York City, one building at a ...
4th 5th 6th area division scale estimation 5.NBT.B 6.NS.B MP1 MP2 7.RP.A.1 4.MD.A

Memorial Day 2026
Number Sense Holidays
Memorial Day is a US holiday observed on the last Monday in May. Who are we honoring? How did the holiday come about? Isn't Memorial Day usually on May 30th? Students learn a little about the his...
6th 7th 8th calendar patterns patterns 6.RP 7.RP 7.SP 5.OA 5th

Mother’s Day by the numbers

Number Sense Holidays Number Sense Holidays
Mother’s Day is right around the corner, and that means big business for the greeting card, flower, and restaurant industries. In this activity, students calculate the average Mother's Day spendi...
5th 6th Mother's day percent percentage division Number Sense 6.RP.A.3 7.RP.A.3 5.NBT.B.7 6.NS.B decimal 5th 6th Mother's day percent percentage division Number Sense 6.RP.A.3 7.RP.A.3 5.NBT.B.7 6.NS.B decimal

Cost of light bulbs
Social Studies Ratio and Proportion
With incandescent and halogen bulbs banned since 2023, students compare CFL, LED, and Smart LED bulbs, calculate energy use in kilowatt-hours, and determine which bulb is the better deal ...
slope graphing linear relationships linear relationships Earth day environment rates 6.RP.3 6.EE.9 6.NS.3 7th 8th 6th

Hybrid, Electric or Gasoline
Algebra Number Sense Probability and Statistics
 Gas prices are up, EVs are everywhere, and hybrid technology keeps improving!So which car is better? Which car would you/your family choose? Students compare the latest prices (updated) of a hyb...
6.RP 7.RP 7th 8th 8th HS 8.EE.C systems of equations environment finding equations linear equations slope graphing graphing linear relationships graphing equations to find solution

Rapunzel
Movies and Entertainment Ratio and Proportion
 A live-action remake of Disney's Tangled is now in the works! In this updated activity, students use ratios and proportional reasoning to estimate the weight of Rapunzel's magical hair i...
5th 6th 7th 6.RP.A 7.RP.A ratio unit conversion animation

Big Bucks

Sports Ratio and Proportion Probability and Statistics
In 2025, Cristiano Ronaldo signed a jaw-dropping 2-year deal worth over $710 million, making him the highest-paid athlete per year in sports history. In this updated activity...
6th 7th Unit rate slope sports sports contracts average soccer baseball football 6.SP 6.RP.2 6.RP.3

The Last Great Race on Earth
Algebra Number Sense Sports Ratio and Proportion
The Iditarod Trail Sled Dog Race is an annual event in which mushers and teams of 12-16 dogs race across Alaska from Anchorage to Nome, in the cold and dark of March. It is also known as “The Las...
rate time rate distance 5.NBT 6.NS MP1 MP2 6th 7th 5th 5.NF.B 6.RP.A 7.RP.A Iditarod winter
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