I personally would go more casual to class than dressy. This striped tank pairs perfectly with the adorable skirt to form the ultimate "first day of class" outfit. Both stripes and zippers are very in right now, so you will be sure to be stylish. I would pair this outfit with a cool pair of sandals.
I fell in love with this jacket. Adding something like it to this outfit would be a good idea. It will keep you warm and also make you look great :) A simple necklace also adds to the look.