Although a considerable amount is known about the development of object manipulation during the 1st year, less is known about how infants manually explore surfaces and relate objects to surfaces. To address these issues, 60 infants (20 each at 6, 8, and 10 months of age) were presented hard and soft objects on tabletop surfaces, which varied in…

Various counting tasks were presented to 24 congenitally, totally blind children, aged 3-13, to determine the behaviors employed to ensure accurate counting. Three dimensions of tactile strategies were found, including "scanning,""organizing," and "partitioning." A developmental progression in the ontogenesis of each…

A resource and activity guide for the developmentally disabled that focuses on methods to teach students skills essential to learning is presented. It is noted that once students begin to acquire these critical skills, they can become active participants in group learning activities, rather than waiting for their turn in individual sessions. They…