Tell them that they can do some homework while you are doing yours. For the younger ones this can be colouring in or something, the older ones homework or study or you can set something for them. I do this to mine, and they very quickly find something else to do. Same with clean their rooms, sort out their clothes etc. Set them doing chores, as there is no such word as bored.

Let them play with their school friends. Let them come around to you, or let them go over to their mates house, then youll get peace and quiet