Design Solutions for Shared Kids Bedrooms.Expedit to the rescue. This mom calls the shelf room divider the best idea in the room. Phia uses her side to hold her belongings while Anthony's side has pegboard from which he hangs his toys
My room divider - 2 bookshelves, a tension rod, and two curtain panels. Definitely incorporating bookshelves, but maybe only a 4 foot high divider. Is less for privacy than creating a separate sleeping area in a "teen cave"