Great study resource for MCSA
Here's a great and free resource for anyone wanting to take the MCSA certification path:
https://www.microsoftvirtualacademy.com
The MVA or Microsoft Virtual Academy has some very interesting videos and self assessment tests that will complement your study.
I advise you to start with the Windows Server 2012 Technical overview.
https://www.microsoftvirtualacademy.com/tracks/windows-server-2012-technical-overview
Highly recomended!