[Icthus]

"...behave/function in a socially acceptable manner..."

You said it in a nutshell. This is where children learn to function in a social setting. Some are easily acclimated, others struggle due to a variety of reasons (i.e., only child, grew up with a stay at home Mom, etc.) Although I didn't finish reading the article, much of it may depend on the type of Pre-K the kids are attending. Some are far more strict than others. One of the Pre-K programs at a local Christian School here requires the kids be potty-trained by 2 years old, if not, then they must find another pre-school to attend. This is done to allow the teacher to focus her attention on "teaching" rather than changing diapers all day long.

[sageb1]

"others struggle due to a variety of reasons (i.e., only child, grew up with a stay at home Mom,..."

Are you saying that having a mom who stays home to raise her child presents a problem for the child????