One thing I failed to mention that I was doing this summer is revising the girls' chore lists. Any long break is a great time to re-evaluate what kids are capable of accomplishing around the house. This also gives you plenty of time to teach the child to do the chore properly, then observe the child doing it properly for days or weeks with fewer interruptions. By the time school's back in, the child should be able to complete the task by herself.
With six girls, is there any chance I could work myself out of a job???