Teens have dissimilar needs as long as it is a concern of their bedrooms, privacy and space than when your teens were babies or kids. Remodel their bedroom for reflecting young adult into which they are growing, giving them one sense of freedom and responsibility. Include them in remodeling process unless you are giving them a surprise, to create one space in which they feel more comfortable, entertain their friends in, study in, keep it organized, and clean.
Study table is must required furniture for teen’s bedroom on which they can do their school homework, read books, etc. Place one shelf above study table and extend it above their bed, so that they can easily pick up or stack their stuff on it. If your teen admires nature then you can create a natural environment in their room itself by placing an artificial tree in room if space allows and place one large rug and some cushions, so that they can enjoy this natural experience completely.