Curated OER
The Hudson's Ups and Downs
Even rivers have tides. Older elementary schoolers will discuss the Hudson River and how weather, water craft, and the ocean cause tidal fluctuation. They will examine a series of line graphs that depict tidal fluctuation, then analyze...
Other
Encyclopedia of Puget Sound
This in-depth resource offers facts on the ecosystem of the Puget Sound. Includes a searchable database of regional animals, described by both their scientific and common names.