Child development refers to the biological, psychological and emotional changes that occur from infancy through adolescence. It involves progressing through developmental milestones in areas such as gross and fine motor skills, cognition, social/emotional development, and speech/language. Understanding child development and psychology is important for caregivers to provide a nurturing environment that supports healthy development and to understand the reasons behind a child's behavior. Studying childcare courses can help parents and professionals gain knowledge about child development, psychology, and childcare best practices.