Presents evidence that the “glass ceiling” affects the career development of women in many professions the USA, including those in which they predominate in the entry levels, such as teaching. Sets out US case law on discrimination, summarizing some of the major judgements on human resource practices that are discriminatory. Lists five factors that impede womens’ careers ‐ stereotypes and perceptions; lack of access to mentoring; discrimination; family responsibilities; and the costs of setting up one’s own business.