Forty-five million. That’s how many words a typical child in a white-collar family will hear before age 4. The number is striking, not because it’s a lot of words for such a small human—the vast majority of a person’s neural connections, after all, are formed by age 3—but because of how it stacks up against a poor kid’s exposure to vocabulary. By the time she’s 4, a child on welfare might only have heard 13 million words.
Where Books Are All But Nonexistent