Other
Sada: Sad Association
This is the largest surviving support organization to help support and advise sufferers of SAD.
Society for Science and the Public
Science News for Students: Nature Resets Body's Clock
Article reports on a recent study which found that people who spent a week in the woods experience a shift of two hours in their internal clocks. Includes a list of vocabulary words from the article.
Other
Guide to Seasonal Affective Disorder
This site give information on SAD, effects it has on people, and what causes it.