Each group needs:

• map of the world with latitudes marked, such as available for download from Teacher Vision
• plastic inflatable globe
• dry erase marker
• (optional) string
• paper (or sticky notes) and pencils, for brainstorming
• notebooks or journals, for case study work
• Hydropower Journal Entry Grading Rubric
• computer with internet access for each pair, to conduct online research and post on discussion board

To share with the entire class:

• image of globe with wind patterns, latitude and Hadley cells
• case study articles: China’s Three Gorges Dam by the Numbers by Brian Handwerk for National Geographic News; and Huge Hydropower Plant to Harness Seawater and Solar Power in South America’s Driest Desert by Cole Mellino for EcoWatch
• student access to an online journal/discussion board