This is one of a series of units for environmental education developed by the Highline Public Schools. This unit on water is designed for primary grades. Included are ten lessons. Each lesson includes the concepts of the lesson, materials needed, time for the activity, procedure, evaluative activities, and follow-up activities. Included are suggested films, books, and worksheets. Materials were tried and evaluated; evaluation data may be obtained from the Highline Public Schools. (RH)