No one left behind, what a load of crap. Push them through the system regardless of how well they did should be the name of it.
When my kid was in K-5th grade you saw it everyday. Teach to the level of the lowest performer in k thru about 3rd grade.
4th and 5th grade was sliding standards. I kid you not there were 3 different word lists for each weekly test. My kid got the hardest set of words each week (fine with me) but other kids got words from another list depending on their ability. And I am not talking about slight differences. In 5th grade if my kid had 7 letter words the lowest ability test was 4 letter words. But guess what, when the grade went in the grade book they all had the same value for determining if the kid passed or not.
During science fair week my kid put in lots of time working on his project and came up with a nice display etc. Another one that got the same credit and A+ on it looked like it was slapped together in 3 minutes the morning it was due. The teacher actually said to my wife at the fair "well they have no support at home like your kid does"
All we are doing with this crap is teaching kids that its ok to be a lazy turd.