Algebra

These posts help students see patterns and relationships.

Valentines and Presidents days

Which Sweet Heart candies are the best deal? – Students decide which quantity of Sweet Heart candies is the best deal.  Ratio tables, unit ratios, devising convincing arguments. Chocolate-raspberry heart-shaped cake – Students build a heart cake and use ratio information…

Share the LOVE contest

Win a year of YummyMath!  Send us your poem, a photo, a video, or a paragraph that shows why you or your students like our work or how we’ve helped your class.  We’ll share the best, and be giving away YummyMath pencils,…

Super Bowl ads

Budweiser’s “Puppy Love” commercial from Super Bowl XLIII Here’s one more Super Bowl analysis to motivate your students: 5 million dollars for a 30-second ad.  That is how much a one-half minute commercial will cost during the 2016 Super Bowl…

Typical Super Bowl scores

The Super Bowl is coming up!  Are you planning to share a prediction for the score of the big game?  Don’t leave it all to chance, use math to help you get a better idea of what to expect for…

Windchill

When the weather person talks about wind chill did you ever wonder how they calculate that number?  In this activity students use the National Weather System chart to gauge wind chill, examine the patterns that correlate increasing wind and/or decreasing…

Pythagorean Triples + coloring

Pythagorean triples are not only handy for students to recognize but produce some interesting and lovely patterns.  We’ve combined a little coloring with our Pythagorean Triple pattern investigation to let your students relax while they color, view the beauty, and…

Data on the National Mall sites

Martin Luther King, Jr. Memorial on the National Mall – Clicking on this image will show it larger in a new window.  Activity #1 – Look at the individuals who are memorialized on the National Mall and using fractions or percents…

Powerball

On Saturday night the value of the Powerball jackpot is now $1.5 billion dollars. Examine compound probability to decide if playing Powerball is worth it.  Check out this amazing Powerball Simulator with your class, it should be a powerful way to show kids…

Ah, the days are getting longer

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…

Earth’s perihelion, 2016

On Saturday, January 2, 2016, Earth will be as close as it gets to the Sun during its orbit. In this activity students become familiar with the terms perihelion and aphelion as they calculate 1 AU and the perihelion distance in miles and kilometers.…

Winter holidays

Christmas tree lights – Students first guess how many lights would be required to decorate this tree.  The class finds the mean and median of those guesses.  Then they brainstorm and refine their guesses. Lastly they figure out how large a…

Do I have enough wrapping paper?

New!   I have to wrap this box.  … with this wrapping paper…  Do I have enough? 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…

Christmas tree lights

Check out the Christmas Tree.  You are heading out to the store to get lights for the tree.  Without calculating, guess how many feet of lights you will need. What information do you need to better estimate the number of…

Saving wrapping paper

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…