Based on the pioneering work of Mary Sheridan this book has bocome a classic guide to the developmental progress of pre-school children. It is widely recognised as an invaluable reference for professionals training or working in health , education or social care. Guidance is offered on ages at which children typically achieve key stages , whilst recognising individual variation in the rate of development and the influence of the child's environment. Based on an ethos of health promotion and the need for a common assessment framework the book will be welcomed by all those who work with infants and young children.