Get a nice dress but nothing too fancy. Usually dresses for homecoming are around the hundred dollar range. Go somewhere like Penny's and find the dresses that they have out on display; those will be the dresses the girls will be wearing. You will want a dress that is fancier than you would wear to school. You should find a whole display of them at any department store actually. The stores whip them out this time of year because that's what most of the girls buy.