It provided needed background to supplement the videos
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It was unnecessary because the videos provide everything I need
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I carried the chapter hard copy around with me.
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I wrote all over my hard copy.
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I liked that it was short and simple.
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It should be longer and more complete
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I generally used all the examples and would appreciate more
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I also used a "regular" physics textbook.
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I mostly used the soft copy online.
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