For a limited time Microsoft is offering free vouchers to sit an MCTS exam through the DreamSpark programme. The MCTS (Microsoft Certified Technology Specialist) stream is aimed at developers and IT professionals and is available in multiple flavours relevant to a raft of developer and infrastructure technologies. Full list of MCTS certs.
DreamSpark is available to all HE students through direct verification as well as schools through an onsite admin. If you are a school pupil and would like access please direct a member of staff at your school to the sign up page so they can register the school for free.
As well as free exams DreamSpark provides a range of Microsoft products for free: