Check these out:
http://www.microsoftvirtualacademy.c...id=uWTT7uCxKJl
They used to be called Hyper-V Virtual Labs, now it's the Microsoft Virtual Academy. It's a great way to get hands-on time with the product performing actual tasks you might do in the real world.
Training for the actual exams, on the other hand, you're probably looking at the Transcender or Train Signal practice exams or similar offerings.