### Number Sense

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#### The Fiscal Cliff - sounds scary

We've used a graphic to help students understand what is meant by the Fiscal Cliff.  Students will understand some of the terms and study the consequences of two upcoming scenarios.   The...

#### Is this possible?

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...

#### Curiosity landed on Mars

Keep your students up on what's happening in space while analyzing Curiosity the Mars Rover's speed, the speed of a radio transmission from Mars, and the deceleration involved in a "sky crane" lan...

#### What time is it in Cambodia?

I need help!  My daughter is traveling in Cambodia and we are supposed to Skype just before her dinner time in Phnom Penh, Cambodia.  What time is that here in Boston?Let you students ...

What is an IPO?  Are they always good investments? Students analyze charts and data, learn a little about investing, calculate percent loss (unfortunately), and make some Facebook stock proj...

#### 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 you have? Act T...

#### 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 and firewood. After approximating ...

#### It sure is cold out ... or is it?

Students ponder the relationship between place latitudes and average January temperatures while they try to discover a correlation. Is this a linear or near linear relationship? … averaging, mis...

#### Linsanity

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...

#### Fast Growing Plant

This activity/post is a little different than are usual posts.  We look at a particular math concept and consider how to use context, models and CCSS math practices to increase stud...