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EDEN PRAIRIE, Minn. – As the Vikings organized team activities ramp up, the learning curve is becoming more like a learning mountain.

"I haven't studied this much football in 6 or 7 years," said linebacker Chad Greenway. "I'm always carrying that iPad and notebook around trying to learn as fast as possible."

With an almost complete coaching overhaul, everyone feels like a rookie as players learn new schemes, plays, and terminology.

"This is the first time I'm in a number system," said quarterback Matt Cassel, who worked exclusively with the staring offense Thursday. "I'm working with flashcards, writing stuff down, and memorizing."

New head coach Mike Zimmer admits these May practices are an information overload, but he's confident that confusion will give way to confidence soon.

"Everything is happening fast right now," he says. "But that's a good thing because players go 'whoa, I have a lot to learn still.'"

Thursday's O.T.A. was the second of a 10-day run.

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