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  • deck

    Feb 09, 2015 505 0

  • deck

    Sep 08, 2014 475 0

  • computational thinking

    Show and tell: Share an interesting application of computation thinking in real life

    Aug 24, 2014 668 0

  • deck

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  • deck

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  • deck

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  • From Caesar to Modern CryptographyFrom Caesar to Modern Cryptography

    Aug 29, 2013 1,720 1

  • cbis

    Feb 15, 2013 873 0