Bad Teachers vs. Bad Parents

It seems like when a student is under performing in school, it is automatically the teachers fault.  That is how teachers are being judged these days.  Let's not forget about the parenting side of things.  Judy Fowlkes from Mlive.com mentions how "there may be a few bad teachers, but many bad parents."  President Obama has mentioned that he wants to weed out the bad teachers.  Judy Fowlkes says, "how are we going to weed out the bad parents?"  Parents are becoming less involved with their children's education.  They are defending their child rather than siding with the teachers.  When parents do that it is really deflating for the teachers.  Who knows better, the experienced teacher or a grade school kid?  Are teachers really to blame or are the parents?