Hi,
I think it depends on your understandings that how much you aware with MCSA if you have better knowledge on that track than go with your teacher advise but if you will study from scratch so I will suggest you that try to get MCITP directly and don't go for
MCSA because its an old and you will have to make double efforts for passing both the exams.
I hope this will help you.
Regards.
Shafaquat Ali.
M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2, URL: http://blog.WhatDoUC.net Phone: +923008210320