Here are some articles with tips for identifying depression in your teen:
http://edu.prinews.net/2010/09/depression-in-teenagers/
http://esnews.org/2010/10/depression-in-teenagers-understanding-the-problem/
and another article that counsels parents on how to deal with the more typical mood swings of teenagers:
http://www.thehimalayantimes.com/fullNews.php?headline=Mood+swings+and+teenagers+&NewsID=259326
http://www.baltimoresun.com/health/bs-hs-ask-the-expert-1104-20101103,0,4107920.story
