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Have some students pretend to be robots while other students program them to complete simple tasks to practice debugging and to emphasize the importance of coding precisely.
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Demonstrate swapping variables' values by swapping the contents of two cups full of liquid; you need a third cup to swap the liquids just like you need a third, temporary, variable to swap the values.
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Explain recursion with the example of determining your row in a stadium by asking the row in front of your what row it is… asking until you get to the first row, the base case.
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To show that algorithm design is difficult, have students write algorithms, exchange their work, and then attempt to execute each others instructions.
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