how to skip repeating value in the table?

  Hello,
  How would skip the repeating table cell?
  For example I have,


  A               B               C
  ----------------------------
  Kevin         English          A
  Kevin         C++              B
  Kevin         Math             A
  Tom          English           B
  Tom           Art               A
  Sarah        C++               A
  Sarah         Math            A


  I'd like to do some sort fo:block skip so that it would print


  A               B               C
  ----------------------------
  Kevin         English          A
                  C++              B
                  Math             A
  Tom          English           B
                  Art               A
  Sarah        C++               A
                  Math            A

  Thanks!


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