Emphasize understanding; de-emphasize memorization:
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Memorizing is not understanding.  Unfortunately, many students have gotten by
for a very long time on the basis of a sharp memory, and have never had to
really think.  Memorization may work for the moment, but after graduation when
they are faced with new challenges, it is their ability to think and to 
understand that will carry the day, not their ability to memorize.  I have
seen too many examples of students who can memorize almost anything, yet cannot
think through a simple extension of what they have memorized.  I suggest they
will not be prepared for what lies ahead after graduation, in work or in life.