Studies of young children's sequence of development from counting to the beginnings of formal arithmetic are reviewed. Four essential basic skills are identified: use of counting words, enumeration, the cardinality rule, and quantitative comparison. The contribution of counting to the development of arithmetical proficiency is stressed. (JDD)

The manual is intended to help parents and professionals understand the motor development of Down's syndrome infants and young children. Following an overview of motor development, gross and fine motor landmarks are presented along with exercises and activities to promote their development in infancy, toddlerhood, and childhood. Each landmark is…

Two studies, one within subjects and the other across subjects, evaluated the efficacy of teaching sounds in developmental sequence to nine young children (ages three to five). Treatment of later-acquired phonemes led to systemwide changes in untreated sound classes, whereas treatment of early-acquired phonemes did not. Findings suggest…