Few school leaders and school architects have recognized or comprehended the potential symbiosis between school site resources and the enrichment of the instructional program, the urgency of repairing and improving the biosphere, the broadening of community life onto school sites, and the recognition of the responsibility role of stewardship of public lands. Accordingly, the authors present 21 site planning concepts that can be the basis for public site policy formulation. The concepts are divided into three sections: economics, environment, and educational outcomes of school site planning. The sections each contain seven planning concepts that utilize research and case studies. The section on economics discusses public tax expenditures for school land as investments not costs and claims that because people value school park sites with natural landscape features, this stabilizes or increases neighborhood property values. The environment section discusses land use, microclimate enhancement, biosphere improvement, unit of design, land form scale modeling, water resources, and esthetics. The section on educational outcomes of school site planning presents guidelines for school-community land resources and discusses outdoor classrooms on school sites, and children's play environments designed for optimal potential growth. (Author/MLF)