These are pics of my classroom for this year. I don't have any up close pics of my curtains. I don't have curtains on my outside windows, but I do have some that cover up high and low shelves. I also have some that cover the front window. We can have curtains over the window to the hallway, but you must be able to see in the room.
My curtains are made of just black fabric with white polka dots. It was super cheap at Wal-Mart and will go with a lot if I decided to change up my theme or decor in the future. My curtains for my hallway window are a bit more seasonal... I have K-State, penguins, and Nemo. They were actually left to me by the teacher I took over for because he didn't have a place for them in his new building!