This winter season leggings, infinity scarfs and tall boots are in style. An outfit I would wear on a casual day to school would be, black leggings, an over sized sweater, an infinity scarf , some fingerless gloves, a black puffer jacket and some tall brown boots. I hope that helped if you were looking to find a casual outfit for a winter day.
Another go to outfit for me in the winter would be a skater dress with a belt, dark colored tights, an infinity scarf, a nice jacket to go with your dress and some booties. For me infinity scarfs are always the way to go, because they keep you warm and it looks chic when all your trying to do is keep warm.