Topic

Activities about estimation

Have a heart
Have a heart

Clicking on the image above will show the heart larger in a new window. Canstruction® is an event hosted in more than 150 countries throughout the world to...

Number Sense Geometry Grades 5–HS
Civil rights marches, how do you count a crowd?
Civil rights marches, how do you count a crowd?

On October 16, 1995, perhaps a million black men gathered for the Million Man March on Washington. This was 32 years after Martin Luther King, Jr. gave his...

Number Sense Geometry Grades 4–HS
What's wrong with this picture?
What's wrong with this picture?

We've gotten used to believing what we read or see advertised. But sometimes the clerk doesn't get the sales discount right or something seems a little off. Let...

Number Sense Geometry Grades 6–7
How Many Donuts is That?
How Many Donuts is That?

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...

Number Sense Geometry Grades 4–7
Green, green river
Green, green river

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...

Algebra Number Sense Grades 5–7
Shamrock Shake
Shamrock Shake

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...

Number Sense Math and Science Grades 5–7
Ladder figuring
Ladder figuring

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...

Algebra Number Sense Grades 6–HS
Is this possible?
Is this possible?

Brian Shoemaker, a Newton, MA mathematics teache r, saw this Dunkin Donuts Mazda traveling down the road. He wondered if that size coffee cup could really have coffee...

Algebra Number Sense Grades 7–HS
The tallest structure made of Legos
The tallest structure made of Legos

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...

Number Sense Math and Social Studies Grades 4–7
Storm cleanup
Storm cleanup

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...

Algebra Number Sense Grades 7–HS
Video game download
Video game download

How long will it take me to download the video game? This can be done as a 3 Act Task. To get started simply show the video and...

Algebra Number Sense Grades 5–HS
The Euro and the international debt crisis
The Euro and the international debt crisis

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...

Algebra Number Sense Grades 6–7