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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...

Voyager on the edge

Algebra Number Sense Math and Science Ratio and Proportion
The two Voyager space probes are in the news recently as they approach the edge of our solar system.  Scientist can tell that the Voyager's environments are changing.  They are receiving m...

Happy 14th B'ak'tun!

Number Sense Math and Science Math and Social Studies
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...

It sure is cold out ... or is it?

Algebra Number Sense Math and Science Data and probability
Students ponder the relationship between place latitudes and average January temperatures while they try to discover a correlation. Is this a linear or near linear relationship? … averaging, mis...

Fast Growing Plant

Algebra Number Sense
This activity/post is a little different than are usual posts.  We look at a particular math concept and consider how to use context, models and CCSS math practices to increase stud...

Chocolate Milk and Mixture

Algebra Math and Food
Image by FreepikChemistry experiments and algebra problems sometimes ask students to create percent mixtures or to change a mixture into a stronger or weaker solution by adding more of an...
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