Number Sense

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What does 95% confidence in the poll results mean?

Algebra Number Sense Math and Social Studies Data and probability
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 measure? What's the margin of ...

How Much is a Tweet Worth?

Algebra Number Sense Math and Social Studies Sports Ratio and Proportion Data and probability
These days it seems everyone is on social media. Are you? Famous athletes and entertainers are on social media and they can make a lot of money.  In this activity students study how ...

What's with the plovers?

Algebra Number Sense Math and Science Ratio and Proportion Data and probability
Cute little birds.  Piping plovers are nesting on beaches along the Atlantic coast. Consequently beaches are often roped-off or closed to protect their nests and chicks. Is this conservatio...

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

Algebra Number Sense Math and Science Data and probability
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...
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