A scarf can be very versitile. It can be tied as a skirt if you like:
And then when you get tired of it, you can untie it, and make something else out of it.
When you're out walking about, you can use the scarf to cover your bottom. Then, when you're sitting in class, or in a restaurant, you might feel your boobs are too exposed, so you can re-position the scarf as a top.