tags: estimation

tags: estimation
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How Many Donuts is That?

Number Sense Geometry Math and Food Holidays and Annual Events 3-act tasks Data and probability Wow factor
Act One:  Take a look at the first picture (Krispy-Kreme-photos). What is the first question that comes to mind? How many donuts is that?  What information would be useful?  ...

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...

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 ...

Shamrock Shake

Number Sense Math and Science Math and Food Holidays and Annual Events
For Saint Patrick's Day add a little nutrition math to your celebration.  In this post we look at calories, carbohydrates, sugars, fats, and proteins to decide what would be left for our day's ...

Ladder figuring

Algebra Number Sense Geometry
   Brian can't even go to his town's spring festival without seeing math. Let your class approximate the height or length of this ladder by using the relative size of the cars or the p...

Is this possible?

Algebra Number Sense Geometry Math and Food
Brian Shoemaker, a Newton, MA mathematics teacher, saw this Dunkin Donuts Mazda traveling down the road.   He wondered if that size coffee cup could really have coffee in it. &nbs...

The tallest structure made of Legos

Number Sense Math and Social Studies Math and Art Ratio and Proportion 3-act tasks Data and probability
Act One: The world record for the tallest structure made of Legos was set in Seoul, South Korea.  Check out this video on youtube! What other questions do you have? Act T...

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 ...

The Euro and the international debt crisis

Algebra Number Sense Math and Social Studies Ratio and Proportion Data and probability
Lately the news is filled with talk of the Euro, US foreign debt, the fragility of European monetary systems, and the interdependence of all of these crisis. In this activity students become fami...

Bank of America Debit Card Fees

Number Sense Math and Social Studies
Millions of people and businesses use debit cards every day.  Banks didn't charge customers for their use. Banks actually gave rewards and incentives to customers for using them. So how di...
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