Ratio and Proportion

New Pirates of the Caribbean – How profitable?

The fifth Pirates of the Caribbean movie opened on Friday, May 26th. Your students might be looking forward to seeing this movie and motivated to understand the investment expenses and profit expectations. Our data and questions will help them judge this…

Memorial Day 2017

This Monday Americans will celebrate Memorial Day.  Who are we honoring?  How did the holiday come about?  Isn’t Memorial Day usually on May 30th? Students learn a little about the history of the holiday, analyze the possibilities for when it is…

Proposed southern border wall

You have probably heard about the proposed border wall that may go up along the U.S./Mexico border.  How much wall needs to be built? How much will that cost? What is that per mile? Per foot? What else could you…

Measuring sea level

What does this gizmo do? We’ve given students a diagram of what the interior of this mechanism contains and asked them to try to decide what its purpose must be. Then we’ve given them the data that was collected from…

Earth Day, 2017

Saturday, April 22nd is Earth Day There is so much to bring to your classroom to support recycling, conserving resources, studying climate change and protecting our planet. McDonald’s moves toward Antibiotic-free chicken – What will the effects be on costs at the restaurant, costs in…

Patriots’ Day

In Massachusetts, April 17th will be a holiday from school and work in Massachusetts.  We celebrate Patriots’ Day on the 3rd Monday in April to commemorate the beginning of the Revolutionary War and the battles of Lexington and Concord. We…

Greatest March Madness program

Based on this data, which do you think is the greatest March Madness program ever? Once students decide their “best program ever” challenge them use a different criteria than they originally used. That is, ask them to think of another way…

March Madness – Does seeding really matter?

March Madness is the big 68 team college basketball tournament that takes over our TV viewing during the weekends of March. School and office friends are filling out brackets.  Engage your students in  percents as they get excited about March…

New baby giraffe

Willow weighed 125 pounds at birth and was 6 feet 1 inch tall.  She will grow to her adult height of around 14 feet tall in only four years! How big would you be if you grew at her rate…

Iditarod 2017

The Iditarod Dog Sled Race begins on Saturday, March 4th in Anchorage, Alaska. This long and grueling competition is called the Last Great Race on Earth. Students do some rate, distance, and hardship comparisons to decide if they agree that the…

Mardi gras – Fat Tuesday

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…

Sweetheart candies

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!

Holiday candy sales

Which holidays are associated with candy? For which of those holidays is the most candy is sold? What percents of annual candy sales does each holiday contribute? Consider using some independent think time, then small group discussion, then whole group discussion…

Super Bowl cheesy pretzel poppers

… 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…