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…

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 students learn…

Now that the shopping season has begun, it’s time to get the packages to your homes. Two big companies take care of a lot of that shipping. How do they manage that? The mechanisms for these two shipping giants are…

Sunday evening, December 2nd, is the first night of Hanukkah this year. I think it was much later in December last year. Why isn’t it always on the same date? Students look at the Hebrew calendar and appreciate the incredible…

In December soccer teams with the strongest world rankings were chosen to play in the once-every-4-years World Cup. The World Cup competition has just begun and will continue through July 15th. The team rankings are calculated in a pretty complex…

This activity is the first in our series on mental math tricks. Let your students develop their own individual way of mentally multiplying by 0.5, 5, 50, 500, and so on. We have a little practice and a requirement for…

We’ve found that some students believe that the approximation that their calculators show for irrational numbers is exact. Here’s an activity that you can advertise as long multiplication review. After they study our calculations have a discussion just to clarify…

Probably most of us have heard of and even used hexadecimal color codes. Don’t you wonder why their number descriptions really make sense? In this activity we first ask students to color in our Golden Spiral by giving them the…

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…

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…

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…

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…

A little ratio art might be a fun way to get ready for the upcoming Memorial Day holiday. In this activity students measure; create whole number ratios for the official U.S. flag; decide how our artistic flags will be different…

How do you calculate and justify which deal is a better savings? By dollars saved? By percent saved? By some other measure? The activity: WhichDealOffersMostValue.pdf CCSS: 4.OA, 4.NBT, 4.MD.A, 5.NBT, 6.RP, 6.EE, 7.RP, 7.EE.A