In Sunday’s Bits/Bytes, I mentioned Dave Grohl’s mother releasing a book on not only what it was like raising her rock star, but interviews other moms about their experiences as well.

Dave & Virginia Grohl were on The Late Show with Stephen Colbert last night.  Besides learning that Virginia is comfortable enough on the road to have beers with Green Day, she also brought some embarrassing artifacts with her as well, including a report card from the 6th grade filled with “unsatisfactory” and “needs improvement” marks.  Watch for yourself: