There are online virtual labs on Windows Server 2012, for all individuals/enthusiasts that can practice in self-guided pace. All you need is just a decent internet connection.
There are topics on Active Directory deployment and management enhancement, configuring iSCSI target, Hyper-V over SMB, Hyper-V replication, Storage pools and storage spaces, DirectAccess in Windows Server 2012, IIS8, iSCSI diskless boot deployment, Powershell fundamentals, Powershell 3.0, Windows Server 2012 Server Manager, IP address management, Online backup service and Dynamic access control. All of these are available at http://technet.microsoft.com/en-us/windowsserver/hh968267.aspx
For Private Cloud guided labs, they are available at http://technet.microsoft.com/en-us/evalcenter/hh913622.aspx. Topics are on System Center 2012.
Please note that these online virtual/guided labs are extremely useful learning resources for hands-on practice experience. They are meant for your convenience so that you can do them on an "Anytime, Anywhere" basis.
For more self-guided learning resources, you can visit https://www.microsoftvirtualacademy.com/
For all newly released, cool and exciting MCSE (Microsoft Certified Solution Expert) certifications, you can visit http://www.microsoft.com/learning/en/us/certification/mcse.aspx. There are new MCSE tracks on Windows Server 2012, Private Cloud (using System Center 2012), SQL 2012, Exchange 2013, Lync 2012 and SharePoint 2013. Note that Except the MCSE on SQL 2012, the pre-requisite certification for MCSE Server Infrastructure, MCSE Desktop Infrastructure, MCSE Private Cloud, MCSE Messaging, MCSE Communication and MCSE SharePoint is MCSA (Microsoft Certified Solution Associate) 2012. So this is the starting certification that can earn you many new MCSE tracks if you choose to complete their elective exams.
To download an exciting copy of Windows Server 2012 Evaluation in ISO or VHD, please go to http://technet.microsoft.com/en-us/evalcenter/hh670538.aspx
For Microsoft Private Cloud Evaluation software, please go to http://technet.microsoft.com/en-US/evalcenter/hh505660.aspx?wt.mc_id=TEC_103_1_33