Language development from infancy through adolescence exhibits remarkable changes. There are also differences among children throughout these years due to variations in their linguistic experiences. These differences may be due to differing linguistic and cultural experiences, or they may be due to differences in the children's biological state. The book describes the remarkable maturational changes and the differences among the children due to these factors. The classroom teacher has to be aware of what these differences may be among the children in order to teach appropriately. The authors go on to describe some of the language educational practices to be used with children of varying levels of maturation and with varying sets of knowledge about language to accommodate to these differences, and to enhance language and educational development in all children.