Is 2023 a special number?
1998 was a Harshad year.
What do you notice about the number 2023?
What is a Harshad number?
Does 2023 meet the criteria?
Big deal? Rare? Often?
Algebra
Genres
Grade
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 you t...
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 paper together.
Con...
Wind chill
The weather forecasters tell us what the wind chill temperature will feel like. How do they figure out that number? In this activity students use the National Weather System chart ...
Whole lot of cookies
This activity has been updated -- See the updated activity HERE
I need help raking my leaves
Brian has spent too much time thinking about his leaves. He's worried about raking them alone and thinking about how long the job would take if people helped.
In this activity students see the inve...
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 buy a lot more than you can buy today...
Do teams that spend a lot win a lot?
In this activity students compare team wins with team salaries in the four major North American sports ... the NBA, NFL, MLB and NHL.
Students use data from recent seasons to create scatter ...
Hurricanes, Typhoons, and Cyclones
Graphic from http://lagoon-inside.com[
This week Hurricane Fiona caused major damage to Puerto Rico, the Dominican Republic and the Caribbean,
This is the season for increased cyc...
How much caffeine are you consuming?
Did you know that there is an amount of caffeine that is too much for the growing brain of a teenager? We did some research and have asked students to examine the sources of caffei...