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Ratio and Proportion

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Algebra 365
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High school
We found 132 post available for you

How much should you spend on this sale?
Algebra Number Sense Ratio and Proportion 3-act tasks Data and probability
This activity can be used in a large range of grade levels.  Your class can work on percents, linear equations or piecewise functions. Act One: We missed the semi-annual sale but we want to get ready...

Green, green river
Algebra Number Sense Holidays and Annual Events Ratio and Proportion
During the St. Patrick's Day parade in Chicago, the local plumbers union dyes the Chicago River emerald green. Students learn what PPM (parts per million) means and  attempt to figure ...

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...

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...

Cruising
Algebra Number Sense Math and Science Math and Food Ratio and Proportion Data and probability
There have been a lot of cruise ship mishaps and disasters this year. While these are in the news, let your students consider how these floating cities manage their resources and which of their need...

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...

Twinkies
Number Sense Geometry Math and Science Math and Food Ratio and Proportion
Brian loves Twinkies and the news that Hostess is going out of business has upset him terribly.  He needs his Twinkies.  Twinkies last forever.  Right?  He's going ...

Starbucks sales (Updated!)
Number Sense Math and Food Ratio and Proportion Data and probability
Time to give students some authentic math on a topic they will surely be interested in ... Starbucks!  We ask and answer a few questions in this activity. About h...

Storm cleanup
Algebra Number Sense Geometry Ratio and Proportion
This activity could be used as an introduction to trig ratios.  Students figure out the approximate length of the huge branch that I have to fell for safety and firewood. After approximating ...

Linsanity
Algebra Number Sense Sports Ratio and Proportion
Jeremy Lin is the New York Knicks most startling player.  His story is exciting in that he graduated from Harvard in 2010 and was not immediately drafted into the NBA.  At first he was...
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