If you want to quickly get up to speed with the new SQL Server 2012, I strongly encourage you to download the free SQL Server 2012 Developer Training kit from http://www.microsoft.com/en-us/download/details.aspx?id=27721.
The SQL Server 2012 Developer Training Kit is a great resource for developers, trainers, consultants and evangelists who need to understand the key improvements introduced in SQL Server 2012 from a developer perspective. It contains a rich set of presentations, demos, hands-on labs and videos that are perfect for self-paced learning or for conducting your own training event. The easiest way to get started with the training kit is to download it, install it, and browse the kit for the content that you are most interested in. Many of the presentations and demos in the training kit include a video that you can watch to familiarize yourself with the content. When you are ready for some hands-on experience, try installing one of the demos or hands-on labs. Each of them includes a dependency checker for installing software prerequisites. A web installer is also provided if you only want to download specific pieces of content or check for updated versions of existing content.