Adolescence, roughly the second decade of life, is a time of great change. Adolescents undergo many changes as they transition between childhood and adulthood, which include significant biological, cognitive, social, and psychological growth. Biologically, adolescents go through puberty – which involves significant physical changes including a growth spurt, the accentuation of sex‐specific physical characteristics, and the development of the ability to conceive children. Cognitively, adolescents experience a significant shift in how they think which gives them new competency in areas such as abstract thinking, hypothetical thinking, and metacognition. Psychologically, adolescents face a series of challenges in developing a sense of autonomy, identity, and self‐image – which may contribute to some adolescents developing emotional or psychological problems. Finally, socially adolescents increasingly value peers, and undergo a series of experiences which serve to complete their transition from being viewed by society as a child, to being viewed by society as an adult – a process often referred to as social redefinition.