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    NOAA
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    In this activity, learners explore how the area of Arctic sea ice has changed over recent years. First, learners graph the area of Arctic sea ice over time from 1979 to 2007. Then, learners use...

    free Ages 11 - 18 45 to 60 minutes
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    PBS
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    In this math lesson, learners arrange pattern blocks to create tessellations and to explore geometric patterns. Learners first explore making patterns with a variety of pattern blocks. They next...

    free Ages 11 - 14 45 to 60 minutes
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    Oregon Museum of Science and Industry
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    This computer interactive lets you explore the effect of changing the number of colors and resolution of a picture. You can see the picture in high quality (72 dots per inch), low quality (10 dpi),...

    free Ages 6 - adult Under 5 minutes
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    Oregon Museum of Science and Industry
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    This is an online activity where learners can virtually mix different colors of light or paint (you can switch between them) and see how the colors combine. It demonstrates how millions of colors...

    free Ages 6 - adult 5 to 10 minutes
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    The Exploratorium
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    In this activity, learners get hands-on experience with ratios and scaling while making their own jewelry out of recycled plastic containers. Learners will practice measuring area and volume as...

    free Ages 11 - 14 45 to 60 minutes
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    The Exploratorium
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    In this activity, learners overlap the three primary colors to see how all other colors are made. This activity also explains how color can be explained by the subtraction of colors of light,...

    free Ages 11 - 18 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners make cool boxes out of old (or new) greeting cards or postcards. Before making the recycled boxes, learners can practice making boxes from grid paper while learning about...

    free Ages 11 - 14 30 to 45 minutes
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    American Museum of Natural History
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    In this activity, learners discover the importance of maps and scale as they work together to create a map of the classroom. The printable four-page PDF handout includes: a series of inquiry-based...

    free Ages 11 - 18 45 to 60 minutes