If you have a kid who goes to kindergarten and doesn't know what a circle is, doesn't know what red and green are, and doesn't know what right and left are, by the time he learns those things, the rest of the class is far ahead of him.
You can't talk of the dangers of snake poisoning and not mention snakes.
When a child shows up for school, and is not physically and mentally ready to learn, he or she never catches up.
There are many stressed single parents who may be working two jobs in order to keep the family together.
My experience with the Junior League, when I worked in Philadelphia for four years in reference to children's things, is that whenever they were asked they responded. They always responded with sincerity, and they did a good job.