Hello Ursula, welcome to Apug! Newt has a good plan, after all he teaches inner-city youth on a daily basis.
I used to hold a two week summer plan through 4-H where I live, first year it was with disposable cameras. I focused on creativity, what did the kids "see" and limited them to just a couple exposures per day for first week. Second week was organizing and presentation with a show on final day, and photo albums to take home. The projects weren't returned to the kids until after the county fair at the end of summer with whatever awards the fair judges presented them.