How old were you when you started kindergarten? Chances are, you and nearly everyone else in your class was about 5 years old. Not so anymore. These days, kids often start after age 5, whether it's due to their state's age requirements or their parents' choice.
Kindergarten age requirements vary by state; the birthday cut-off -- the date by which a child must be 5 before entering kindergarten -- is July in some states, December in others. But studies by childhood development experts suggest that chronological age should not be the only factor when it comes to determining kindergarten readiness.