Young children grow, but adolescents change—and change is confusing. It confuses the sprouting adolescent to wake up every morning in a new body. It confuses the mother and father to find a new child every day in a familiar body—a child contumelious of the things that yesterday's child wanted, a child with a different rhythm of living, a child who talks knowingly about things that yesterday's child never heard of.

Who Pushed Humpty Dumpty? Dilemmas in American Education Today (1971)