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Measuring Rules
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In this math activity, learners create their own units of measurement by making noodle rulers. Learners practice estimating and measuring objects using the noodle rulers .
Find Someone: Use Math to Learn About Friends
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Create a “Find Someone” list, with about 10 items, each containing a shape, number, or measurement. Can you find someone in the group with hair about 4 inches long? Someone wearing parallel lines?

Small Snails, Enormous Elephants
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This activity (located on page 2 of PDF) introduces learners to the real size of animals using nonstandard measurement.

Exploring the Solar System: Big Sun, Small Moon
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“Exploring the Solar System: Big Sun, Small Moon” is a hands-on activity that explores the concept of apparent size and allows visitors to experience this phenomena using familiar objects—a tennis bal
Piece It Together: Puzzle Hunt
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In this activity, learners follow clues to find five puzzle pieces, then assemble them. This activity works well with a whole group, individuals, or families.
The Right Fit
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In this math activity, learners trace their hands and estimate the number of beans that can fit into their hand tracings. Then, learners glue the beans to the tracing to test out their estimations.
Size Them Up: Learning About Volume and Capacity
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In this activity, learners will put a set of containers in order by capacity. Would the tallest container hold more or less water than the wide, short one?
Build a Bridge
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In this activity, learners use recycled materials to build a bridge that holds as many potatoes as possible. They investigate weight, height, strength, and measurement as they seek design solutions.

Mitten Challenge
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In this activity, learners try to put together toy bricks—wearing oven mitts on their hands! This activity shows learners how difficult it is to build small things when your tools are too big.
Caterpillar Measure
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In this activity, young learners use different-sized paper 'caterpillars' and various household items to predict and measure their height.

Exploring Size: Powers of Ten
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In this activity, learners play a card game that explores the relative sizes of various objects. Learners compete to organize their hand of cards into lists of objects from largest to smallest.

Exploring Size: Measure Yourself
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In this activity, learners mark their height on a height chart and discover how tall they are in nanometers.

Make a Dinosaur
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In this activity, learners explore the size and scale of dinosaurs. Learners listen to "Dinosaurs, Dinosaurs" by Byron Barton to understand some background information about dinosaurs.

Scale Model of Sun and Earth
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In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

Exploring Size: Memory Game
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In this activity, learners play a card game that explores different size scales--macro, micro and nano.

The Size and Distance of the Planets
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In this activity, learners investigate the concepts of relative size and distance by creating a basic model of the solar system.

Good Catch!
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In this activity, learners "go fishing," then practice ruler use and size/pattern comparison with the animals they catch.

Estimation
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In this online activity, learners will explore size estimation in one, two and three dimensions. Multiple levels of difficulty allow for progressive skill improvement.

Line Up: Using Math To Stand In Line
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Put math of measurement into lining up — and make waiting in line fun. Choose a size characteristic that learners can physically compare, such as foot length or hair length.

How Small Can You Cut?
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In this lesson, learners cut paper into very small pieces to explore the small size of quarks, the smallest thing we know of on Earth.