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    Computer Science Unplugged
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    This activity about cryptographic techniques illustrates how to accomplish a simple, but nevertheless seemingly impossible task—making a fair, random choice by flipping a coin between two people...

    $1 - $5 per group Ages 8 - 18 30 to 45 minutes
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    Computer Science Unplugged
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    In this activity, learners conduct a simulation exercise related to public key encryption and try to intercept a message sent between two learners. This activity works with two learners but is most...

    free Ages 11 - 18 30 to 45 minutes
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    Computer Science Unplugged
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    In this activity, learners listen to songs and decode hidden messages based on the same principle as a modem. As a final challenge, learners decode the binary messages in a music video. This is an...

    free Ages 6 - 18 30 to 45 minutes
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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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    In this outdoor activity, learners use pegs (like tent pegs) and string or elastic to simulate drill sites and roads in Northern Canada. Learners are challenged with figuring out how to connect the...

    $5 - $10 per group Ages 11 - 18 30 to 45 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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    Computer Science Unplugged
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    This activity explores what it means for a computer to be intelligent and introduces the topic of what a computer program is and how everything computers do simply involves following instructions...

    free Ages 8 - adult 10 to 30 minutes
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    Computer Science Unplugged
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    This activity aims to stimulate discussion on the question of whether computers can exhibit “intelligence,” or are ever likely to do so in the future. Learners play a game and try to distinguish...

    free Ages 11 - 18 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    In this activity (on page 2), one person "programs" the other like a robot to move through a space, trying to get them to avoid obstacles and reach a goal. The idea is that computers and...

    1 cent - $1 per group Ages 6 - 14 10 to 30 minutes

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