I just sent in my high school report card from 2006-2007 and college transcript for 2008-current. I took a semester off in the middle because of financial aid issue, so I just printed a receipt from amazon and that was fine.
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Application Sent : 8/22/2012 Dallas Lockbox by lawyer | Delivered : 8/24/2012
I-797C Acceptance Letter : 9/1/2012 (Nebraska) | I-797C Biometrics Letter : 9/10/2012
Biometrics Completed: 9/18/2012 | EAD Approved : 10/09/2012
EAD Received: 10/13/2012 | SSN Applied: 10/24/2012
SSN Received: 10/30/2012 | DL Received: 12/14/2012