Impress your parents at dinner
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 litt...
Number Sense
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Will Damarious Randall have to pay big?
Warriors won the NBA Championships. Randall won't have to buy jerseys!
The Cleveland Brown's safety player, Damarious Randall, posted this tweet. Its been ...
How fast can you run?
Have you heard of The Six Million Dollar Man? He was the character in a science fiction show about an astronaut that was rebuilt, bionically, after his space ship crashed. He could run a...
What me? Irrational?
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 ...
Pizza party figuring
In this activity students decide how to divide 2 pizzas amongst 6 adults and 3 pizzas amongst 8 kids. Fractional pizza parts need to be drawn and considerations discussed about which f...
Want to earn $150,000? - Mersenne prime search
What's a Mersenne prime? How hard could it be to find the next one?
Why are there only 50 known Mersenne primes? What's with $150,000?
Is this promo a good deal?
McDonald's was offering an "Arch Card" special deal. If you bought an Arch Card for $100 you were entitled to a free BigMac or EggMcMuffin every week for a full year. The card was only offered a...
Is my son going to win again?
Brian son's pretty young but is he still going to whoop his dad? They were playing Monopoly Junior. Can you decide who will win? In this activity use addition and/or multiplicatio...
Holiday candy sales
Which holidays are associated with candy?
For which of those holidays is the most candy sold?
What percents of annual candy sales does each holiday contribute?
Consider using some in...
Population Clock
How in the world does this clock conclude that there is a net gain in the United States of one person every 14 seconds?
Have a little care about younger children when using this activity. T...