Ratio and Proportion

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More eruptions on Hawai'i's Kilauea

Algebra Geometry Math and Science Current events Ratio and Proportion
The Volcano Kilauea is continuing to spew molten lava and ash on the island of Hawai'i. This volcano is on the tip of the southern most Hawaiian Island. Is that significant? In this activit...

Patriots' Day

Number Sense Math and Social Studies Sports Holidays and Annual Events Ratio and Proportion
In Massachusetts, Monday April 15th, 2019, will be a holiday from school and work.  We celebrate Patriots' Day on the 3rd Monday in April to commemorate the beginning of the Revolutionary War a...

Which is the best deal?

Algebra Number Sense Math and Food Ratio and Proportion
How do you calculate and justify which deal is a better savings?  By dollars saved?  By percent saved? By some other measure? Looking at 4 different deals, students will need to...

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...

Bits, bytes, and nibbles

Algebra Number Sense Math and Science Ratio and Proportion
Clicking on the image will show it larger. I'm not very good at understanding how large my device capacities are and how big the files that I want to download are in comparison.  I decid...
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