My wife and I got married last February, I'm an U.S. citizen She came with me on April of 2004, we had two kids one was born in Mexico and the other one here. Back in 2004 my son and my wife crossed the border with a tourist visa. My wife & son had the B1/B2 visa. My wife is a professional teacher from Mexico, I don't know if this will help? I want to know which forms I need to fill up and also which documentation I need to sent with the application. Thank You

Go here and read it:

http://www.immihelp.com/greencard/familybasedimmigration/persons-in-us.html