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Dots to Squares
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As learners play this strategy game, they develop understanding of squares, area, and perimeter. On each turn, a player draws a line between two dots next to each other on the grid.

Creative Caps
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In this activity, young learners will explore shapes, textures, and geometries using household materials.

Exploring Products: Nano Sand
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In this activity, learners explore how water behaves differently when it comes in contact with "nano sand" and regular sand.

Paths and Ponds
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In this activity, learners use squares to figure out how many border tiles are needed to enclose different areas.

Dollar Signs
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In this activity, learners use number sense and mental math strategies to estimate the price of a sign.

Exploring Baking Powder
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In this activity, learners examine baking powder, a combination of three powders: baking soda, cream of tartar, and cornstarch.

Drying It Out
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In this activity, learners investigate and compare the rate of drying in different conditions.

Sizing Up Hail
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In this activity, learners will estimate the sizes of balls to learn how to estimate the size of hail. Learners will compare their estimates to the estimates of their peers and the real measurements.
Rate It: Working With Zero and Negative Numbers
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In this activity, learners will rate the day, a book, or something else on a scale from -2 to 2. This activity works well for groups of all ages.

Beaded Braids: Investigating Patterns & Ratios
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In this activity learners create patterns of hair beads.
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 .

Exploring Tools: Special Microscopes
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In this activity, learners use a flexible magnet as a model for a scanning probe microscope (SPM). They learn that SPMs are an example of a special tool that scientists use to work on the nanoscale.
Quick Questions: Create a Survey
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In this activity, learners will conduct an open-ended survey, and then organize and analyze results. What languages does everyone speak? What’s the most common? the least common?

Cookie Mining
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In this activity, learners explore the economics of coal mining as you they use fake money to purchase mining tools, attempt to carefully mine their cookies, sell their chocolate chip ore, and try to

Take a Hike!: A Family Forest Walk
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In this family or group inquiry activity, learners use their senses to explore a local forest or woodland.

I Like to Move-It
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This is an activity which will allow learners to gain an understanding of lemur behavior through observation and role play.

Traveling Through Different Liquids
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Learners observe and record what happens when they manipulate bottles containing a liquid (water or corn syrup) and one or more objects (screw, nail, paper clip).

Canine House of Cards
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This simple construction activity teaches the importance of architectural structure. Learners build and test designs for a paper "doghouse" strong enough to hold the weight of a jumbo dog biscuit.

Underwater ROV
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In this online Flash game, learners will explore a coral reef using an underwater remotely operated vehicle (ROV).

Twisted Tesselations
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In this activity (on pages 41-47 of PDF), learners explore tesselating geometric patterns (repeated shapes, similar to the art of M.C. Escher).