Get a call going so that when you hollar for them they know it's time to come in. Like, with mine, which are still waiting on the coop to be finished, I sit in the room where they are and when I speak to them I say "Here chick, chick, chick" and they look up at me and respond by coming to my voice. Now I can't say that for my younger bunch which is only a week old but they will get used to it also.
Find something that suits you when it comes to a call but don't get discouraged if they don't come the first few times. And sometimes the chickens come in on their own, they don't need to be called. Usually this happens before dusk.
You know the old saying "chickens always come home to roost". But I will recommend to get a call for them in case you need them in sooner. And also when you see them coming go outside and call them any ways, this way they will know that you are calling them. This advice comes from me watching my Grandmother as a child. Hope it helps.