The problem seams to be the same all over the world! And I think it is useless to ask what they should know. You also could ask what the parents should do, there too many of them out there that dont care and even with a list they will not bother............
In switzerland visiting kindergarden is compulsive the year the child turns five. The two years before entering first grade the teachers try very hard to level out the differences and it is almost impossible as they have children that dont even have basic manners while others read the newspaper.
It is very sad and leads to private kindergartens for priviledged children.
And the margin is getting wider.
Granny