University of California
Sio/ El Nino
This page has links to the causes of El Nino, a non-technical definition of El Nino, causes, and tons of other information.
Other
Physical geography.net: Introduction to the Atmosphere
A very detailed description of air masses, how they move and interact, and what weather takes place when this happens.
PBS
Pbs Learning Media: Weather: Collection: Bringing the Universe to America's Classrooms
Get up close to a variety of weather conditions, encounter local weather patterns through spectacular imagery, and learn how to observe and describe different weather conditions with the beloved characters from PEEP and the Big Wide...
PBS
Pbs Learning Media: A Look at Weather Factors: Interactive Lesson
Students learn about four factors that describe different types of weather -- temperature, wind, precipitation, and sunlight and clouds -- as they explore various weather conditions and find evidence that describes each type of weather...
New York Times
New York Times: Crossword Puzzle: Weather
The New York Times Learning Network has developed interactive and printable crossword puzzles. The theme of this one is weather.
Curated OER
Physical geography.net: Introduction to the Atmosphere
A very detailed description of air masses, how they move and interact, and what weather takes place when this happens.