Ratio and Proportion

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NHL Playoff games can sure last a long time!

Algebra Number Sense Sports Ratio and Proportion Data and probability
Revised! We're watching another Stanley Cup playoff now. Will there be any really long games during the playoffs? In 2013, a Stanley Cup playoff match between the Bruins and Blackhawks wen...

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...

Population Clock

Algebra Number Sense Ratio and Proportion Data and probability
How in the world does this clock conclude that there is a net gain in the United States of one person every 14 seconds? Have a little care about younger children when using this activity. T...

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...

Raising the bar

Algebra Number Sense Math and Science Ratio and Proportion
Recovery of the treasure from the 1941 sinking of the S.S. Gairsoppa was recently completed and a huge amount of silver was brought up from the ocean floor.  Let your students get a fe...

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...

Launch of the next ISS crew

Number Sense Math and Science Ratio and Proportion Data and probability
If all goes well, the next crew of the International Space Station (the ISS) will launch on Sunday, Novemeber 13, 2011 from the  Baikonur Cosmodrome in Kazakhstan. Keep your student ...
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