Compare the elements of rock music, including tone color, rhythm, form, melody, and harmony, with those same elements from another musical period...

This is a fairly interesting topic.  I would say that we could broaden the topic to include "popular music" with Classical music.  If this can be done, the link below could be an excellent opportunity.  You can compare Mussorgsky's "Night on Bald Mountain" or Beethoven's "Fifth Symphony" to the disco versions of each song featured on the Saturday Night Fever soundtrack.  This might be an excellent opportunity to examine tone color, rhythm prevalent in a disco version of the classical piece, as well as the different harmonies present in each.  If this cannot be done, I would suggest using Beethoven's Ninth Symphony and the multiple remixes and variations of it, most notably by Billy Joel as well as UNKLE.