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Sound– Lesson 10: Changing the Pitch by Changing the Tension

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Plant Growth and Development– Planting the Seeds

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Composite image of stars from the Chandra X-ray Telescope
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Explore Smithsonian: How Do Astronomers See the Invisible Parts of the Universe?

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Land and Water– Lesson 2/3 The Water Cycle: Modeling Land and Water

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Land and Water– Literacy Extension

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Life Cycle of Butterflies– Lesson 3: Learning More About Caterpillars

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Sound– Lesson 1: Thinking about Sound

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Floating and Sinking– How is Salt Water Different from Fresh Water?

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Rocks and Minerals– Organizing Minerals

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Life Cycle of Butterflies– Literacy Integration: Nonfiction 1 - Multiple Intelligence Retell

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Sound– Lesson 9: Making Sounds with Strings

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Ecosystems– Material Consideration

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Land and Water– Lesson 2 The Water Cycle: Modeling Land and Water

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Teacher Tips: Weather

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Soils– Organizing the Distribution Center

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Electric Circuits– Making a Filament

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Sound — Lessons 1-4: Materials

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Explore Smithsonian: How Are Optical Instruments Tested Before Space Flight?

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Rocks and Minerals– Lesson 3: Learning More about Rocks

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Microworlds– Unit Preparation

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Rocks and Minerals– Lesson 8: Shining a Light on the Minerals

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Life Cycle of Butterflies– Lesson 14: Discovering that Butterflies are Insects

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Life Cycle of Butterflies– Lesson 2: Caring for Caterpillars

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Explore Smithsonian: How do Scientists use Electricity to Study Fish Populations?

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Why is My Shadow Shorter Sometimes and Longer Other Times?

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Explore Smithsonian: James Smithson - The Founder of the Smithsonian

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Explore Smithsonian: What can we Learn from Lion Poop?

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Floating and Sinking– Weighing Floaters and Sinkers

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Motion and Design– Using Cooperation Cups

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Sound– Lesson 2: How Sound Travels

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