Seventeen student worksheets form a secondary school unit which focuses on the challenge of shared usage of water resources. Pressure currently exists for a more balanced approach in which all legitimate interests in a water source are served. The worksheets include readings which focus on enough water for all, the water cycle (including a programmed exercise), power politics and hindsight, the selling of water, wetland areas, the new environment, the McGregor River diversion, the Alcan story, the Kemano Completion Project, the potential of the Stikline River, and water as a precious commodity. Charts of the world's water supply, British Columbia's major rivers, water balance graphs, and major hydroelectric power sites are also provided. Both readings and charts are accompanied by discussion questions. A brief test concludes the unit. (KC)