Kitchen, dining room, bathroom... In fact one could have just about every room in a house! I imagine a mansion with a library, conservatory, servant's quarters etc, and room in the grounds for stables, potting sheds, summerhouses, patches of woodland, a maze, and so on. Of course you'd need a separate background page for each location.
Or perhaps expand your schoolroom to a boarding school with dormitories, staffroom, sports pavilion -with changing room and showers - (there are surely a lot of bits of sporting kit that could be used for spanking) - and, of course, the Head's study.
Then again, how about a beach scene, set in some secluded cove...? | 
