A seventh element is cliques, such as in American Teen (2008). Cliques are big in the life of a teenager, hence the theme. It is only befitting that this be a major elemental factor. If only this movie could be considered a major. Ack! Other movies to bring cliques to the foreground are Employee of the Month (2006), Mean Girls (2004), and Whatever It Takes (2000).
While I've chosen to narrow this to seven elements that caught my eye, there are undoubtedly more that could be discussed. Like I said, teen movies have always intrigued me.