A study was conducted to develop baseline information on special education early intervention programs. A review of the literature revealed the following: the effects of a stimulating or depriving environment appear to be most powerful in the early years of childhood; there is evidence that the effects of early intervention programs for children…

This report contains analyses of key aspects of the scope, quality, and vitality of the Nation's science and engineering enterprise and global science and technology. The report presents information on science, mathematics, and engineering education at all levels; the scientific and engineering workforce; U.S. and international and development…