Using the same bedding (top photo) for both the crib and toddler bed in this room ties them together. As does using the same color paint for wall accents. See more: Clean + Modern in Seattle
This shared room is so small that dividing it up wasn't a viable option. Instead this mom made each side of the room visually identical with bedding and accents. See more: My Room: Lillian & Abigail. More examples of this look here and here.
In this room the bedding for each child is completely different, but a colorful bunting hung across the length of the room visually unites the space. See more: A Shared Room With Beauty And Brains
This room is first and foremost tied together with the striped walls, but notice how the baby and child's space have been adorned with similar, but not identical shapes and colors, one with hanging poms/flowers, the other with fabric embroidery hoops. See more: Hadley & Kohen's Shared Stripe Stunner
Even though there is a three year age difference between the two sisters who share this room, their belongings are integrated, they have side-by-side desk space and vintage patterns are used throughout to create a warm, unified room. See more: Bella and Lily Share Sisterly Love TIPS FOR GIVING EACH KID SOME SPACE
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. See more: Phia and Anthony's Shared Space
Charlie and Henry sleep in bunk beds, but there is a semi-private desk area on either side for each of them to have a little bit of space to call his own. See more: Charlie & Henry's Shared Bedroom.
These two brothers have always shared a room, and quite happily, but now that they are older their parents wanted to give them each a little privacy in their shared room. They chose to do it with tall wardrobes, which also function as storage. See more: A Tall Wardrobe as Room Divider for Two Teen Boys
Too small for a physical divider, each child gets their own set of shelves while a chest of drawers visually divides the space. See more on Bondville.
Using a physical gate to divide up a room might seem extreme, but it could be a smart, temporary solution for roomies with a significant age gap. See more: Using Baby Gates To Divide A Room
Another bookcase used as a room divider (this time a Billy). In this case, it's used for a room shared by a mother and daughter. The daughter's side has the shelves and the backside has been papered to look like a wall. See more on Ikea Live.
A curtain room divider makes perfect sense because it's impermanent and flexible.
These similar, but differently patterned papers offer a subtle but not jarring visual divider of this space for two kids. See more: Ikea
This is the same idea as above but with two really different color schemes which make a statement: my side/your side. Do you have design tips for shared rooms to share? Sound off in the comments! (Images: 1. & 2. Reader Natalie 3. Hannah/Cosmos in Chaos 4. Mo/Babyccino 5. Campbell Photography 6. Tree Fall Design 7. Brad Trent 8. Bethany Nauert 9. Patric Johansson/Hus & Hem 10. Milk & Honey Photography 11. IKEA Family Live 12. Ikea Live 13. Bruce Hemming/Room for Children, Rizzoli, 2010 14. IKEA 15. du cote des che vous)