Described are the materials developed by Priority One: Environment, a project of the Township of Union Public Schools, Union, New Jersey. The program was designed to develop multidisciplinary and multimedia materials for grades 1-12. This publication describes the development process, the 13 multimedia units, the evaluation process, cost effectiveness data, and inservice required. The data indicate students studying the materials do significantly better on tests related to the program than control groups, kits last about four years, consumable costs are low, and inservice training needed to utilize the program is minimal. (RH)