All over the US, children are going home after school and spending time alone until their parents get home from work. This is what a latchkey kid is. The term came about because they have their own key, usually on a chain hung from their neck, to unlock their home each day when they’re done with school.
They typically have no adult supervision for two to three hours each evening while they wait for their parents to come home. There are more than four million grade-school-aged latchkey kids because there are a lot of dual-income parents and single parents in the workforce today. But this number is down from its high in the 80s when over half of all children were latchkey kids