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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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    Science Friday
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    In this activity, learners watch a video to learn about a couple who built a home out of shipping containers in Brooklyn, New York. Next, learners design and build a 3D scale model of a shipping...

    1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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    PBS
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    In this math lesson, learners apply the concepts of ratio and proportion to the capture-recapture statistical procedure. Learners are given containers (the bay) and an unknown number of fish-shaped...

    $5 - $10 per group Ages 11 - 14 45 to 60 minutes
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    Twin Cities Public Television
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    This activity (on page 2 of the PDF under SciGirls Activity: Tug O' War) is a full inquiry investigation into tug-of-war physics. Groups of learners will test two tug-of-war strategies. Which...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours
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    PBS
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    In this math lesson, learners apply the concepts of ratio and proportion to determine the length of the Statue of Liberty's torch-bearing arm. Learners use chart paper, string, and rulers to...

    1 cent - $1 per group Ages 11 - 14 45 to 60 minutes
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    Twin Cities Public Television
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    In this engineering activity, learners examine bicycle mechanics and gear ratios. Learners determine which gears will help them bike a set course in the shortest amount of time.

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    PBS
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    In this math lesson, learners apply the concepts of ratios and percentages to the distribution of letters contained in a box of Alphabits® cereal. Each learner is given a sample of cereal from the...

    $1 - $5 per group Ages 11 - 14 45 to 60 minutes
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    TERC
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    Choose a recipe to double (or triple, quadruple, or halve). Show everyone the recipe and engage them in figuring out: How much will we need to increase the recipe to feed everyone? Once the group...

    1 cent - $1 per group Ages 4 - 14 30 to 45 minutes
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    Lunar and Planetary Institute
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    In this activity, learners measure the diameter of their water balloons, model an impact, measure the diameter of the “crater” area, and determine the ratio of impactor to crater. This activity is...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners use their hands as tools for indirect measurement. Learners explore how to use ratios to calculate the approximate height of something that can't be measured...

    free Ages 11 - 14 10 to 30 minutes

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