The proper place and the best place for children to learn whatever they need or want to know is the place where until very recently almost all children learned it – in the world itself, in the mainstream of adult life…We made a terrible mistake when (with the best of intentions) we separated children from adults and learning from the rest of life, and one of our most urgent tasks is to take down the barriers we have put between them and let them come back together.

-John Holt, from How Children Fail