Help - Sample Case studies

Hello

I am new to the Dynamics CRM and require a sample requirements in which I can go through each of the requirements and go for a practise in CRM 2011 Dynamics. I have a fair understanding of different modules like Sales, Service and Marketing and littble as part of customizations which I am learning. If someone can provide a sample case study then I can do a practise on the tool.

Thanks in Advance.

-Srinivasa Nadella