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  • deck

    Feb 09, 2015 565 0

  • deck

    Sep 08, 2014 533 0

  • computational thinking

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

    Aug 24, 2014 785 0

  • deck

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  • deck

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  • deck

    Sep 30, 2013 594 0

  • From Caesar to Modern CryptographyFrom Caesar to Modern Cryptography

    Aug 29, 2013 1,846 1

  • cbis

    Feb 15, 2013 930 0