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Quipus
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Learners create an Incan counting device called a quipu (pronounced kee-poo).
Make Matt's Coder/Decoder
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In this Cyberchase activity, learners make decoders to send and receive secret messages. Learners make the device out of two 8-ounce cups and two code strips.
Colour by Numbers: Image Representation
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This activity shows learners how computers use numbers to represent pictures. A grid is used to represent the pixels (short for picture elements) of a computer screen.