Curated OER
The Biggest Dam in the World
Learners recognize that the Three Gorges Dam is now being constructed in China on the upper Yangtze River. They build a dam in an empty fish tankusing common materials they have at home or can easily find, such as twigs and leaves, food...
NOAA
Noaa: Century's Top Weather, Water and Climate Events
Discover what experts view as the top weather related events of the 20th century, get background information on them and see photos. Some of the events covered are the Galveston Hurricane of 1900, the 1930s Dust Bowl, Hurricanes Camille...