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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...
I'm going to help save the planet by adding solar panels to my roof! Should I tilt the panels on my roof to more accurately aim towards the...
It's time to get ready to plant my garden again. But here in Boston we have to start our seeds indoors to give them a head start before...
Note: This is not intended as a comprehensive activity with solutions. Instead, it serves as a discussion prompt. Have fun! It's been a crazy winter of extremes through...
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...
On August 5, 2010, the San Jose copper-gold mine near Copiapó, Chile collapsed stranding 33 miners in a large cavern more than 2,000 feet below ground. A new...
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...
Cute little birds. Piping plovers are nesting on beaches along the Atlantic coast. Consequently beaches are often roped-off or closed to protect their nests and chicks. Is this...
Help your students understand what they are reading or hearing about the California drought. Terms like acre-feet, chains, and furlongs are often used to describe the volume of...
[caption id="attachment_15749" align="aligncenter" width="500"] Halema‘uma‘u Lights the Morning Sky - Photo taken from the overlook by the Volcano House on January 30, 2014 - NPS photo[/caption] The volcano,...
In order to cook Paella (a delicious Spanish rice dish) I needed to buy Saffron spice. It was hugely expensive. So, I've decided to start a business of...
This activity has been updated (2026). See the new activity here: https://www.yummymath.com/post/light-bulb-cost-comparison/ There's a lot of misinformation out there about the cost to consumers of CFL and LED...