Ratio and Proportion

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Will college be affordable?

Algebra Number Sense Ratio and Proportion Data and probability
Whether you or one of your siblings is going off to college next fall, it is useful to know how much colleges cost.  Not going to college this fall? No worries, we can use the informa...

David Price, big bucks per ...

Number Sense Sports Ratio and Proportion
  David Price, a 30-year old pitcher from Toronto's Blue Jays, was hired with a 7 year contract to be the Red Sox's new ace pitcher for $217 million dollars.  That is the largest amount eve...

Mark Zuckerberg and Priscilla Chan to give away 99% of their shares of Facebook

Algebra Number Sense Math and Social Studies Ratio and Proportion
  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 enough left over to live on? The...

Oreo Stuffiness

Number Sense Math and Food Ratio and Proportion
There is yet another Oreo... This activity builds off the work that Dan Anderson's math class revealed about Original Oreos and Double Stuff Oreos. Students begin by working with the weight of just...

How Much is a Tweet Worth?

Algebra Number Sense Math and Social Studies Sports Ratio and Proportion Data and probability
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 this activity students study how ...

What's with the plovers?

Algebra Number Sense Math and Science Ratio and Proportion Data and probability
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 conservatio...

Growth of Facebook update

Algebra Number Sense Ratio and Proportion Data and probability
Facebook is so accepted in our world today that it is even part of nightly news broadcasts as people are noted for receiving huge numbers of likes in appreciation or interest. Mark Zuckerberg, the f...

McDonalds moves towards antibiotic-free chicken

Number Sense Geometry Math and Science Math and Food Ratio and Proportion
   Recently McDonald's announced that by 2016 they will use only chicken raised without the antibiotics that are used in human medicine.  McDonald's plans to join Chick-fil-A, Pa...

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...

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...
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