Bronfenbrenner's ecological theory describes child development as being influenced by various environmental systems, ranging from immediate family and friends to broader societal and cultural influences. The systems include the microsystem (immediate environment), mesosystem (connections between microsystems), exosystem (external influences), macrosystem (overarching culture and beliefs), and chronosystem (dimension of time). Bronfenbrenner emphasized that development is shaped through complex interactions between these nested systems over time. Schools and teachers play an important supporting role in child development by providing stability, relationships, and care, especially for children lacking these supports at home.