Tuesday, February 28, 2017, will be the day before Ash Wednesday and the start of the season of Lent. Mardi Gras is a last hoorah and is celebrated throughout the world with feasting, partying, and general indulgence. In New Orleans…

Will we have a 29th of February this year? How can you tell? Students work with a flow chart to deduce what years are going to be leap years. They learn about the exact measurement of a solar year and…

Here’s some more Valentine’s Day fun. How many dollars worth of sweet hearts candies are sold each Valentine’s season? What more could kids want than Sweetheart candies, problem solving, critical thinking, and number sense reasoning? Enjoy!

Clicking on the image above will show the heart larger in a new window. Canstruction® is an event hosted in more than 150 countries throughout the world to demonstrate “innovation, hunger relief and collaboration”. Canstruction has raised more than 40 million…

… A little more delicious work for the Super Bowl. Students follow a recipe that involves “cutting the cheese” block, figuring how many servings, estimating how many times they need to multiply the recipe by to make enough pretzel bites, and…

Super Bowl numbers are appearing again. As students start getting into the current Super Bowl hype, help them to understand the notation that the sports writers and advertisements are using. Introduce Roman numerals to your class. In this activity they learn…

Lunar New Year begins on Saturday, January 28th. This will be the year of the Fire Rooster. The year name is a combination of 10 Heavenly Stems and 12 Earthly Branches creating a sequence of year names that eventually repeat. Students…

Rogue One has only recently come out and grossed nearly 300 million dollars in its opening weekend. We were curious about how often and how profitable the Star Wars movies have been. So we gathered data on each movie’s budget…

What’s your guess as to how fast the number of daylight hours will change each day from now until June 21st? Will the changes be dramatic? Will the lengthening days be only a subtle change? Students make guesses; compute how…

Every birthday I consider whether I’m in the prime of my life … like when I was 29 years old. Will this new year be a prime year? I hope so. Don’t use Google or Siri or whatever. Just see…

On Wednesday, January 4, 2017, 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? In this activity students become familiar with the terms perihelion and aphelion as they calculate…

Dr. Sara Santos is a popular mathematician and speaker on mathematics. She has worked out a method for wrapping boxes (rectangular prisms) as efficiently as possible. (Watch the video above) Her method was written up in this article in Mental Floss and…

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 students ponder this store menu and see if they can figure out…

As we get ready for next week’s holiday, students can study a map of the annual Macy’s Thanksgiving Day parade, describe, measure and hypothesize why this route was chosen and then calculate how long each band will be marching and…

They changed it. That is so not fair … or is it? You can check out a video news story on the delicious shrinking Toblerone bar here. Two sizes of Toblerone bars are now configured differently. How much did they…