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Students
fail to be able to recognize the use of a physical
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principle
in an exam question, so we rephrase the question so as
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to
give “keywords” or “triggers”.
Almost all students can now
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respond
correctly, so we are satisfied.
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In
designing a computer-based homework system, problems #1
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and
#5 use the same physical ideas.
When starting the HW, the
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student
does #1 incorrectly. Returning to
the assignment on the
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next
day, she does #5 correctly. Should
we now have the
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computer
give her credit for both? After
all, by the next day
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“she
learned the principle”. (What if
the situation had been
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reversed?)
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