Which is the best site for learning primavera p6?

Actually I don't prefer learning P6 via web site, I can recommend for you Training Course (3 Months)

through an accredited educational institution such as AUC or Oracle, you need an extensive study, workshop & testing if you needed for your career.  Good Luck

Hi Yasir,

I highly recommend projectcubicle.com . Here you can find good sources. 

Dear Mr.Yasir,

There is a  new way to learn primavera online and its very easy to learn. you can just give a try. its free for beginners

please click here www.youtube.com./tutomaashcom

it use animated slides to explain the topic then open software to demonstrate. if you like their videos you can visit www.tutomaash.com. there areHD videos that explain primavera in well detail. its also certificate course

Learning primavera through web site is not advisable. It will only give you the solution to some of your questions but not offer thorough learning. It is better to join any institute which offers a course of about2 to3 months. For reference purpose you can watch youtube & primavera forums where answers is given for your queries. 

Best of luck

try Youtube :D  

http://www.youtube.com/watch?v=vWRBI39-fCA&list=PL66DE296

You can find a lot of videos in Youtube about planning, scheduling and reporting.

You can join planning forums like plannertuts or planningplanet to explore more. You can find a lot of Q & A for most of the issues faced by users. Have a try.