| Sumario: | This article focuses on a research that discusses the acquisition of elementary science behavior by children of disadvantaged families. The experimental elementary science program, Science: A Process Approach, developed by the Commission on Science Education of the American Association for the Advancement of Science, has endeavored to develop a sequence of instructional materials which are applicable for the entire elementary school population of children. The instructional materials are intended for use in all geographic regions of the United States, for children in kindergarten through grade six, within a variety of population centers including rural, suburban, and urban, and with a wide range of social and economic backgrounds encountered in these environments. The data support the hypothesis that it is possible to create a set of instructional materials that can be successfully used with a wide range of the elementary school population. It does appear that the level of verbal ability influences the level of behavior acquisition within certain processes. As the instructional materials are currently presented, there are some behaviors for which the children from the disadvantaged population are less facile.
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