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    Twin Cities Public Television
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    In this technology activity, learners explore digital imaging and pixels. Learners "transmit" an image to a partner by creating an image on grid paper. Learners then use a code of zeroes...

    1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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    Computer Science Unplugged
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    This activity about cryptographic techniques illustrates a situation where information is shared, and yet none of it is revealed. A group of learners will calculate their average age without anyone...

    1 cent - $1 per group Ages 11 - adult 5 to 10 minutes
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    National Center for Women and Information Technology (NCWIT)
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    When a lot of people share one network (such as cars using roads, or messages getting through the Internet), there is the possibility that competing processes will create a “deadlock," or an...

    1 cent - $1 per student Ages 8 - 14 45 to 60 minutes
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    Computer Science Unplugged
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    In this puzzle, learners investigate the decisions involved in linking a network between houses in a muddy city. It can lead on to a discussion of minimal spanning tree algorithms for optimizing...

    1 cent - $1 per student Ages 8 - 18 30 to 45 minutes
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    Oregon Museum of Science and Industry
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    In this activity about encryption, learners cut out a secret decoder badge from a handout and use it to encode messages to each other. They can also create their own codes that are different from...

    1 cent - $1 per student Ages 8 - 14 30 to 45 minutes

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