The document discusses the family life cycle model which outlines 6 stages of family development: 1) the unattached young adult, 2) newly married couple, 3) family with young children, 4) family with adolescents, 5) launching family, and 6) the family in later years. Each stage involves first and second order changes as the family system expands and contracts with the entry and exit of members. Common challenges are discussed for each stage related to children, parents, and grandparents. The family life cycle approach is used to understand a family's development by examining what stage each generation is in and how their stages relate to any presenting problems.