- Amazon Adventure
- An on-line journey exploring the Amazon river system in Brazil and Peru, Amazônia's history and environment, and the people who live there.
- The Daily Planet
- Department of Atmospheric Sciences at the University of Illinois "Geosciences Webserver" provides teachers and students with resources and expertise to support project-based inquiry in geoscience education.
- Earth System Science Community (ESSC)
- ESSC is an ongoing NASA funded project with the goal of building an on-line Earth Science curriculum so that "any teacher, student or school connected to the Internet [can] begin investigating the Earth system quickly, easily, and inexpensively.
- Resources on rivers in general as well as some specific rivers. A predominantly American site with, some Canadian rivers included.