This document proposes a detailed foundation for curriculum planning in grades 1, 2, and 3 in the Argentine elementary schools. The book covers such topics as curriculum objectives, contents and activities, personalization and individualization, socialization and regionalization, quality, organization, and suggestions for subject matter and learning activities in particular areas. The ideas allow each school the freedom to elaborate on its own curriculum--choosing, adapting, and adding activities, contents, and methodologies. A general bibliography is included along with a glossary of important terms. (VM)