Number Sense

Grade

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How big of a crepe can you make?

Algebra Number Sense Geometry Food Ratio and Proportion
At Costco you can buy this huge tub of nutella.  It contains nearly 7 pounds of chocolaty-hazelnut spread. We use nutella to make banana/nutella crepes.  How long will that tub last u...

2 New Macy's Parade balloons

Algebra Number Sense Geometry Holidays Current events Ratio and Proportion
 As the Macy's Parade returns to public viewing, here are two balloons that Macy's artists have added. Can you figure out their dimensions? Macy's give their dimensions in bicycle lengths, taxi w...

Steepness and fall hiking

Algebra Number Sense Geometry Science Sports
Fall is a beautiful time of year for hiking. Many students will be walking in the woods and mountains to enjoy the colorful leaves and the cool weather outside.  Let them combine what they ...

That's a big tomato!

Algebra Number Sense Geometry Food Ratio and Proportion
These Aussi tomatoes (the tomato on the left of all of the tomatoes) are huge.   How much do you guess one weighs? Can you figure it out?

2 Hiking Activities

Algebra Number Sense Sports Ratio and Proportion
How much food do you need to carry to hike the Appalacian Trail? The AT is a hiking trail that begins in Georgia and ends on Mount Katadin, Maine. Fall is a beautiful time to be outdoors or on ...

Can you show that the Pythagorean Theorem works?

Algebra Number Sense Geometry
Use this activity to help your students work through the meaning of the Pythagorean theorem. Pythagorean theorem experiences are often skill and drill work with contrived right triangle problem...

Tiny vacuum with a huge reach

Algebra Number Sense Geometry 3-act tasks
From the vacuum description and advertisement in the PDF, how long do you think its cord must be? Thanks to Brian Shoemaker, Newton, MA teacher, for the idea and pictures.

How long will it take you to trick-or-treat?

Number Sense Geometry Holidays
It's Halloween and this is your neighborhood. How long will it take you to trick or treat at every house in your neighborhood? Possible conversation with students: How long will it tak...

Largest coffee, new world record

Algebra Number Sense Geometry Food
The world record for the largest cup of coffee was recently set (see picture above).  In this activity students explore scale, similar figures, volume and measurement as they estimate the...

Spiraling squares - compass and straight edge

Algebra Number Sense Geometry Holidays Art
Can you see the many spirals in this design? Students calculate the size of each increasing round of squares and consider what sort of spirals these must be. Work...
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