Ratio and Proportion

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Inflation and the cost of gasoline

Algebra Number Sense Math and Science Math and Social Studies Ratio and Proportion
In 1980, one gallon of gasoline costs $1.22.  Today's prices are a lot higher.  Is that because the price has gone up or because in 1980 you could buy a lot more than you can buy today for...

Mallie's latest Big Burger

Algebra Number Sense Math and Food Ratio and Proportion
It's time to treat your students to ratios, proportions, fractions and BIG BURGERS! In this activity students explore the ratio of the various ingredients in the world's largest burger (pic...

Holiday shipping

Algebra Holidays and Annual Events Ratio and Proportion Data and probability
Now that the shopping season has begun, it's time to get the packages to your homes.  Two big companies take care of a lot of that shipping.  How do they manage that? The mechanis...

Is this promo a good deal?

Number Sense Math and Food Ratio and Proportion Data and probability
McDonald's was offering an "Arch Card" special deal. If you bought an Arch Card for $100 you were entitled to a free BigMac or EggMcMuffin every week for a full year. The card was only offered a...

Water saving toilets

Geometry Math and Science Ratio and Proportion Data and probability
     How much water is used? How much water could be saved? For Adventurer members we have an editable Word docx and solutions with added world-wide information.

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...

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...

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...
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