Content Misconceptions
Explain nested for loops using a car odometer, the innermost loop controlling the ones digit must cycle fully before the outer loops steps forward, to help students better understand nested loops through a real world example.
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Misconception: The update in the index in a for loop (i.e., the third part of the for loop control statement) happens after the all the steps inside of the loop have happened.
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Emphasize to students that in CSS id is typically more specific than class, as beginners often struggle to disambiguate these attributes.
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Misconception: Students get confused by the multiple equals signs comparison operators in Javascript making it difficult to motivate the difference to beginning students.
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Misconception: If you consistently use the same variable names during class in lectures and examples, students may incorrectly assume objects in Java can only have those names.
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Misconception: students struggle with the onMousePress method (and other mouse interaction methods) in the Java objectdraw Library from Williams College; they need help understanding it’s called even when don’t explicitly call it.
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Teach "if" statements before "switch" statements, then explain how "switch" is a specialized case of "if" by translating an "if" statement into a "switch" statement.
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