PBS
Pbs: El Nino
You can link to the anatomy of El Nino, chasing El Nino, and El Nino's reach. There is a resource page and a search page.
US Navy
Office of Naval Research: Oceans in Motion Currents
Use this site to learn what the Navy has to say about ocean currents and then test your knowledge with their quiz.
University of Southern California
University of Southern California: Ocean Currents and Climate
The climate of our planet is greatly affected by Earth's oceans. Learn here about the different oceanic currents and the role those currents play on climate.
Exploratorium
Exploratorium: Science Snacks: Spinning Blackboard
Explore the effects of drawing in a straight line within a rotating frame of reference. This activity requires a turntable. If this is unavailable, a cake turntable with a glued-on center post might work as well.
MadSci Network
Mad Scientist Network: Differences in Vortex and Venturi
Question and answer regarding the basic differences between a vortex and the Venturi effect.
Pennsylvania State University
Pennsylvania State University: Bad Science
This site from the Pennsylvania State University is maintained to provide teachers and students with examples of the bad science often taught in schools, universities, and offered in popular articles and textbooks.
Curated OER
University of Oregon: Coriolis Effect
This site from the University of Oregon provides a great explanation of the Coriolis Effect and then gives several chart type examples to help the understanding of it.