I am also thinking of signing up my ds for the intro to expo course because it's in the evening, but I'm not sure if he should be in that one or Expo 1 (but Expo 1 wouldn't fit our schedule). But he'll most likely be going to school next year, but I would still like to supplement his writing.
For my older ds, I was hoping to be able to put him in Intro to rhetoric, but have the same problem.