There are many ways to tweak it to your needs -- and for all grade levels.
William - I added a bit of my own tweaking to include a brief discussion of
Copyright and Fair Use (due to a recent Getty thread). I knew you wouldn't
mind. What you are asking the kiddies to do certainly falls under Fair Use -
and I think it is OK for them to know that.
This lesson is linked from the Art History page of ideas...and from high
school and middle school lessons.