Things I didn't know I was learning until years later:

• self-reliance, goal-setting and self-motivation. encouragement of curiosity.

• communication, group cooperation\compromise, group leadership.

• social tolerance, self-defense, objective thinking.

It starts with egg hunts where one kid leads, or physically directs another kid who is blindfolded. It starts with sharing days where kids bring in object of value to them and talk about it, and the others listen and ask questions if they have any. It starts with simulating genuine human experience in a safe environment that will allow them to acquire resources and knowledge on their own, not get drilled with academic qualifications and times tables.

(3) the geography of a foreign land, like New Jersey;

NJ resident here, the layouts of the towns, roads and highways make no sense until you've gotten lost in them. Know what I mean?

P.S. perhaps kindergarden is too early, but camping hiking and even an afternoon at the lake..matters.

Edit: I somehow mistook this to be specifically Kindergarden. This comment applies to that only then.