Teacher Resources
World and Local Rivers
National Geographic has a great site about rivers that you should visit.
The United States Geological Survey has good information and comparison charts on Earth's rivers and streams.
Idaho State University's Water Resources Research Institute has a site that explains the importance the the Snake River's Tributary Basins.
River Teaching Resources
Check out these BBC Learner Guides on the Water Cycle and River Landforms.
Howstuffworks has a great article on floods that you will want to check out.
Advanced notes on the geography and geology of rivers.
The U.S. Geological Survey offers a number of water-related data sets about Idaho water, including this interactive map of river streamflows.
Water Cycle Websites
Great activities to teach about the water cycle.
NOAA has great resources on the Water Cycle, including an engaging lesson plan with student handouts and 3-D paper craft.
Worksheets and Lessons
EdHelper has worksheets and lessons of all kinds and grade levels on rivers. Take a look.