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    American Museum of Natural History
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    Learners compare a life-size drawing of a Tyrannosaurus rex head and a full-size Sinornithosaurus body to understand that dinosaurs varied in size. Learners trace individual pieces of a dinosaur on...

    1 cent - $1 per group Ages 8 - 11 1 to 2 hours
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    Oregon Museum of Science and Industry
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    In this activity (on pages 55-66 of PDF), learners fold paper into origami shapes and then combine several identical shapes into a three-dimensional structure. There are clear, colorful...

    1 cent - $1 per student Ages 4 - adult 45 to 60 minutes
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    NRICH
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    This puzzle provides an interesting context which challenges learners to apply their knowledge of the properties of numbers. Learners need to work with various types of numbers at the same time and...

    1 cent - $1 per student Ages 11 - 14 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    In this activity (on pages 15-18 of PDF), learners make a life-size two-dimensional paper model of their own skeletons. They trace a partner onto a large piece of butcher paper, and then the...

    $1 - $5 per student Ages 4 - 11 45 to 60 minutes
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    American Museum of Natural History
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    This activity has three story puzzles learners can solve to learn about life in the Arctic. Through this story-sequencing activity, learners will explore how life for polar bears and the native...

    1 cent - $1 per student Ages 4 - 8 30 to 45 minutes
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    The Exploratorium
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    In this web-based activity, learners try to figure out who in an online chat room has their matching puzzle piece. This is a matchmaking activity that can be used as an icebreaker to introduce...

    $1 - $5 per group Ages 11 - 18 45 to 60 minutes
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    NRICH
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    In this number puzzle/trick, learner #1 thinks of a number between 1 and 63. Learner #2 shows learner #1 six cards and asks them whether the cards contain their number. Learner #2 uses this...

    1 cent - $1 per group Ages 14 - 18 5 to 10 minutes
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    American Association for the Advancement of Science
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    In this online game, learners build complicated machines to complete simple tasks. The game starts with a power source on one side of the screen and the task on the other side. Learners select...

    free Ages 8 - 11 5 to 10 minutes
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    American Association for the Advancement of Science
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    In this online puzzle game, learners need to choose a path from a starting number to a goal number. Along the path are simple operations (e.g. add 1, subtract 2, multiply by 2) to change the...

    free Ages 8 - 11 10 to 30 minutes
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    Computer Science Unplugged
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    In this activity, learners use a fictitious map of "Tourist Town" and counters to problem solve how to place ice-cream vans on street intersections so that every other intersection is...

    $1 - $5 per group Ages 11 - 18 45 to 60 minutes

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