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How much does the biggest Lego set ever cost?
How much does the biggest Lego set ever cost?

Picture from the Verge. Click to see the story. Note: This is a remake of our 2014 " How Much Does a Lego Cost " activity How much...

Algebra Number Sense Grades 5–6
Total solar eclipse - apparent sizes
Total solar eclipse - apparent sizes

Where will the eclipse be seen? What if you are not in the path of totality? Total solar eclipse? What is apparent size? How can the moon seem...

Algebra Geometry High School
Giant iceberg breaks off from Antarctica
Giant iceberg breaks off from Antarctica

The crack in Antarctica's Larson C ice shelf has been growing for years (2017). Has the speed of the rift's growth stayed about the same? increased? decreased? Do...

Math and Science Current events Grades 5–HS
Drinks at the Fair
Drinks at the Fair

At the amusement park, our friend, Jason, was intrigued with this sign for drink deals. He and his family come often to the park and, during the summer...

Algebra Food Grades 6–HS
Fireworks on your calculator
Fireworks on your calculator

Let your students experiment with their graphing calculators to create a nice fireworks display? We've written a brief activity that questions students about manipulating parabolas, adjusting their calculator...

Algebra Geometry Grades 7–HS
Saving Water Bottles
Saving Water Bottles

In my grocery store they now have these new water bottle refilling stations. You can simply refill your own container with water instead of buying a six-pack of...

Algebra Math and Science Grades 7–HS
New Pirates of the Caribbean (2017) - How profitable?
New Pirates of the Caribbean (2017) - How profitable?

The fifth Pirates of the Caribbean movie opened on Friday, May 26 th ,2017. Your students might be looking forward to seeing this movie and motivated to understand...

Algebra Ratio and Proportion Grades 5–HS
Fidget spinners - fad or lasting trend?
Fidget spinners - fad or lasting trend?

Do you recognize what these are? Are you noticing students with these gadgets? Is this a forever toy or just the newest thing? Can you tell by looking...

Current events Data and probability Grades 5–HS
Proposed southern border wall
Proposed southern border wall

You have probably heard about the proposed border wall that may go up along the U.S./Mexico border. How much wall needs to be built? How much will that...

Number Sense Math and Social Studies Grades 4–6
Measuring sea level
Measuring sea level

What does this gizmo do? We've given students a diagram of what the interior of this mechanism contains and asked them to try to decide what its purpose...

Algebra Number Sense Grades 5–HS
April's calf was born!
April's calf was born!

At about 10:00 am, April 15th, April's calf was born. Everyone will be talking about it and smiling constantly. Here's some fun math stuff to bring with you...

Algebra Number Sense Grades 4–7
What does 95% confidence in the poll results mean?
What does 95% confidence in the poll results mean?

There have been a lot of polls about who will win the Presidential election. I get so confused when polling results are reported. What is a 95% confidence...

Algebra Number Sense Grades 7–HS