ALA defines Young Adults (i.e. teens) as ages 12-18. While tween was termed by corporations for marketing to the under 12, I've had parents pushing for non-Juvenile based books, movies, programming, etc for their (in their eyes) no longer juvenile but not yet teenaged child.
Should tween materials, space & services be labeled as such & separated from Juvenile or YA? If so, where should the distinction be drawn, especially with regards to materials (e.g. Harry Potter, Diary of a Wimpy Kid). If not, how do you satisfy the needs of older children (8-12 depending on the kid) who seem to have outgrown Juv materials & programs but might not be ready (intellectually or emotionally) to mix with the older crowd?