Those (Students), who are preparing for CCNA exam these Packet tracer practice file are use full for their study & exam preparation, these files provides you basic idea, how to create your own LAB, with Packet tracer, By creating such kinds of LAB, you will learn, how to use your commands to create LAB, troubleshoot, debugging, packet flow with Packet tracer's feature.

You can access Packet tracer LAB by this following links,
https://docs.google.com/file/d/0Bz_zkK7xns5xTlNIdnZJMWJBRVE/edit?usp=sharing
  

If you want to watch Videos, use following link, then you can watch more video by clicking on more Videos

https://www.youtube.com/watch?v=SdGY2CkJbDo

I hope this information will helpfull for new CCNA student, those who want to pass their exam with good rank