Number Sense

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Earth Day Actions for Our Planet (April 22)

We have 16 activities that you could use for Earth Day! April 22nd is Earth Day. Help your students become activists for our planet? We have ...

Lego Fireman +

At the Toys R Us store, we saw an amazing LEGO creation.  He was a life-sized LEGO fireman with a walkie-talkie, an oxygen tank and even an oxygen...

Earth Day (April 22) Actions for Our Planet

<a href="https://www.freepik.com/free-photo/watercolor-textured-blue-background_15559582.htm#fromView=search&page=1&position=22&uuid=5c957d6a-8767-4ae9-9522-cdefcf4825b7">Image by ra...

How hard is it to find a 4 leaf clover? (3 Saint Patrick's Day activities)

Shamrocks in Ireland are actually 3-leafed white clover, trifolium repens. If you are lucky, you can sometimes find a four-leafed clover. How rare is finding a 4-leafed clover?  How hard do you...

Daylight savings time

Updated and improved! Is Daylight savings time helpful?  How does it make you feel? "Spring forward, fall back" Early Sunday morning, March 12th at 2 am, we change our clo...

Two 12s or one 18?

A little more pizza fun before Pi day! Which should we order and why? Two 12-inch pizzas or one 18-inch pizza?  Which will give you more pizza? More crust? Which is the better deal?  ...

How many feet of lights should I buy for my tree?

Check out our Christmas Tree! We need to buy lights for the tree.  Without calculating, guess how many feet of lights we will need. What information would help you t...

Winter Solstice 2023

It is really dark out now.  Why is that? Students appreciate how their latitude effects the darkness of their late afternoon location as they study the earth's tilt and the logic of da...

Do I have enough wrapping paper?

In this problem based activity students first guess and then try to calculate whether they will have enough paper to wrap this present without taping pieces of wrapping paper together. Con...

How many gumballs are there?

Gumball Machine Problem from Brian Marks on Vimeo This problem is a little puzzle to get your students thinking, estimating, and calculating. We've given you a pdf file w...