There is an imbalance of expectations and preparation for the nation's children. They are told that the only way they can succeed in life is to go to college, so many of them do not realize the other opportunities available to them such as moving up in the workforce, trades, and being self-made. While a good majority of students (I think at least 60% is completely fair) should go to college, there is still a good amount who are needed elsewhere and skilled in those areas and many of those kids do not even realize it. This really hurts us.
The other side is the lack of preparation. On both ends K-12 fail the kids. It's catered towards pushing kids to college and not on being truly useful after graduating if you were not to be going to college when a good percentage of our workforce has nothing to do with higher education. That said, the preparation we are given is not solid. Many teachers at the college level are frustrated by the "advanced" classes when schools don't solidify the basics. Calculus is fine and dandy only if you have a great grasp of Algebra, which many students do not.
Of course, many schools are exceptions and they need to be examined and applauded.
Once you get to college those high expectations and failure to prepare really affects students who no longer feel like that is there place. There is a difference between difficulty and not being prepared. These students don't even, at times, feel like they can overcome the difficulties because they are already so far behind and too much is expected of them by grades, commitment, and material which they had no adequately been schooled in.