How did they figure these tips?
Act I: This restaurant bill has the suggested tips, but they are smudged out. What should they be? Consider having students make a fast 5 to 10 -second prediction in th...
Math and Social Studies
Genres
Grade
The Game of Go
March 9th was the first round of the competition between Lee Se-dol, one of the World's best Go players, and Google's artificial intelligence program "AlphaGo". The first and sec...
Data on the National Mall sites (2 Activities)
Activity #1 - Look at the individuals who are memorialized on the National Mall and using fractions or percents decide what you can notice about those we honor. The activity is called "MLK...
Mark Zuckerberg and Priscilla Chan to give away 99% of their shares of Facebook
That sounds like an awful lot of their Facebook shares. They want to help create a better world for their daughter, Max.
I wonder if they will have enough left over to live on?
The...
How Much is a Tweet Worth?
These days it seems everyone is on social media. Are you? Famous athletes and entertainers are on social media and they can make a lot of money. In this activity students study how ...
Cost of light bulbs - updated!
Algebra
Number Sense
Math and Science
Math and Social Studies
Ratio and Proportion
Data and probability
There's a lot of misinformation out there about the cost to consumers of CFL and LED bulbs and the savings in energy and money that could be realized.
Let your students "do the math" and realiz...
Really old
Tom Lehrer is a singer, songwriter, satirist, pianist and mathematician who has written some wonderful songs. In 1959 he wrote a song called "New math". At that time, much of mathemati...
Methane math
Updated! Carbon dioxide and methane are our two most prevalent human-contributed greenhouse gases. This holstein cow is one of many huge contributors to our methane production. &nb...
Lifespan of a meme, the Harlem Shake
Five friends who skateboard and video tape made up a strange dance one afternoon and filmed it on February 2nd (look it up on youtube!). Now the whole world knows them and their da...
Happy 14th B'ak'tun!
Luckily, we’ve passed 12/21/2012 and the world is still here and we’ve made it into the start of the next Mayan calendar cycle ... the next B’ak’tun.
The ancient Mayans had an interesting...