I bought some blackboard sticker a while ago and covered one locker door with it. Blackboard paint would have been better but this way I can take it away whenever I get bored to it.
And now the bookshelf works from both sides.
Even our cat appreciates. :)
I also had to add some motivational postcards to my corner. Just wonder where have I lost my other (read: better) Einstein card with the text "Imagination is more important than knowledge".