Discuss a possible theme with your teen girl before you begin to decorate her room. You can do the entire room with zebra print or black-and-white stripes, or you can opt for a country look, a rustic appearance or even an urban appearance. Choose a comforter, throw pillows and blankets that match the desired theme for a complete, thought-out look.
Wall hangings are an essential part of any properly decorated room, so choose black-and-white decorations that complement the rest of the room's appearance. Hang black-and-white photos of your teen's friends and family members in solid black frames, select black-and-white movie posters, or even incorporate black-and-white figurines into the room.
Repaint your teen's furniture to be white or black. Choose one color and stick with it. Black paints over even darkly stained furniture, while white paint will take several coats to cover up a darker finish. Paint each piece of furniture the same color for a symmetrical, even feel. If you'd rather opt for new furniture, choose pieces that your teen will use regularly. A bed and dresser are a must, but your teen may also like an ottoman, a desk, a vanity table or even a night stand.
Select white carpet or pale-colored laminate flooring for your teen girl's bedroom. Light colors make rooms look bigger, so a white floor can brighten up even a small bedroom. If time or budget does not allow for new flooring, opt for a variety of throw rugs. Choose one large black-and-white rug, or several smaller rugs in solid white or black.