Learn about the biological and physical changes, social and emotional changes, teen brain development of teens and more. We also provide tips on what parents can do to help their teen through these changes. Puberty is a period of several years in which rapid physical growth and psychological changes occur, culminating in sexual maturity. A rebellious young man with a troubled past comes to a new town, finding friends and enemies. Teens going through puberty will have many changes in their developing bodies as growth surges and muscles change shape. There's a very broad range of time in which kids hit puberty-related growth spurts: Puberty — or sexual development — is a time of dramatic change for both boys and girls ...