This is one of a series of units for environmental education developed by the Highline Public Schools. This unit on cities and urban life is designed for use with ninth-grade students, but could be used with other students. A variety of activities and materials for the activities are included. While some of the activities apply directly to Seattle, Washington, many could be used in any urban area. Each lesson usually includes the concept of the lesson, materials needed, notes to the teacher, procedures, and evaluation activities. (RH)