This year we will add the 29th of February to our year? Why do we do that? How can you tell? What if we didn’t add a day every 4 years? Calendar math and flow charts.

Students learn the rules for evaluating Roman numerals, decipher copyright dates, see how Roman numerals are used today, and do some strange looking arithmetic and surprisingly easy computation.

3 activities about wrapping presents: On the diagonal, 3-act by estimation with iPhone, and judging sizes and needs by estimation with man and shopping basket.

Worldwide Nike supports many teams and athletes. They design, manufacture, and supply gear for almost every sport imaginable. How much are those give-aways worth? Is the company going to go broke? Probably not. Nike is huge. In this activity we…

On Friday, June 21st, at 11:54 am EDT, the Earth’s North Pole will be tilted as far towards the Sun as it will ever be in the year. This marks the longest day of the year in the Northern Hemisphere and…

This weekend is the wedding of Prince Harry and Meghan Markel. This will be quite an event and we can expect it to dominate the media. What have you heard about the event? What interests you? The mathematics in this…

Scoring Ski jumping – The scoring rubric for each of the Olympic events is intended to eliminate the possibility of scoring bias from the judges. Let your students learn more about the scoring of one event and decide whether it seems fair…

Passover will begin this year at sundown on Monday, April 10th. Jewish families will gather to commemorate the exodus of the Children of Israel from slavery in Egypt. The celebration begins with a traditional meal, the Seder, where the story of…

… 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…

Passover begins this year on Friday evening, April 19th, 2019, with a Passover seder dinner. Passover is one of the three high holidays in the Jewish religion and celebrates the Exodus of Jews from slavery in Egypt. Let your students…

Recently the MAVEN spacecraft (Mars Atmosphere and Volatile Evolution Mission) that was launched on November 18, 2013 reached Mars and attained an elongated orbit around the planet. How does someone figure out how to do that?

Updated for 2018!The scoring rubric for each of the Olympic events is intended to eliminate the possibility of scoring bias from the judges. Let your students learn more about the scoring of one event and decide whether it seems fair…

Students can use the man or the basket as a reference as they try to approximate the size of these gifts and how much wrapping paper will actually be needed. Approximation, surface area, reasoning explanation, and diagraming! An X-box is…