Lead
"Eighty percent of brain development happens by age three." "Six years old is the window." Walk into any parenting section of a bookstore, scroll through social media for ten minutes, and this kind of language is unavoidable. For parents raising four- and five-year-olds, the anxiety that comes with it — What if we're already too late? — is not a small thing.
Meanwhile, the number of early education programs on the market roughly equals the number of claims made about them. Flashcards, English immersion, cognitive enrichment, athletics, music. Each arrives with something that looks like evidence. Enrolling in all of them is unrealistic; opting out of all of them feels risky.
This article reviews the long-term evidence for early education, drawing only on studies with experimental follow-up data — the kind that tracks children for years, not weeks. The conclusion, stated upfront: effects exist. But the interventions that produced them are substantially different from the programs commercially marketed as "early education."