Shamrocks in Ireland are actually be 3-leafed white clover, trifolium repens. If you are lucky, you can sometimes find a four-leafed clover. How rare is finding a 4-leafed clover? How hard do you have to look? What size area of clover must you examine to find one?

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There's a number used to quantify how fast a virus will spread, the R-naught number. As the coronavirus is spreading though out the world, let your students see how the threat of infection is measured and understand the mathematics of judging how a population will be affected.

Why do we have the clock set at this time? Click the image to find out.

8 possible activities!

Celebrate π in your school and in your math class with activities that demonstrate how π was derived; visually show why π makes sense; show a surprising place where π is used; increase students ability to measure and long divide; applauds the talent of people who can memorize large strings of numbers; and lets students just have fun.

When Brian traveled to Crete last summer with his wife and son on an Archaeological dig, buying gasoline for his small rental car got him wondering again.

He was pretty good at understanding the value of Euros by changing prices into dollars but figuring out the cost of gasoline in Euros per liter versus dollars per gallon was confounding him.

Should he figure out how many gallons of gas he could get for one Euro?

Or how many liters of gasoline he could get for one dollar?

Is gas, and therefore, driving more expensive in Greece?

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The Iditarod Dog Sled Race will begin this year on Saturday, March 7^{th} in Anchorage, Alaska. It is often called The Last Great Race on Earth because it is so long and grueling. Students do some rate, distance, and hardship comparisons to decide if they agree that the Iditarod is really the Last Great Race on Earth.

Texas gets to send a lot more delegates to the July National Democratic Convention than New Hampshire does. How do they figure out what each state's fair number of delegates should be? What are those weird abbreviations in the allocation formula above? Do the math!