Just a quick update - I used the resource linked previously (http://teachfastly.com/activity-map/christian-views-of-creation) last week with both 7th and 9th grade homeschooled students.
Out of an abundance of caution, I send an email containing the script to the parents in our co-op. I received exactly 3 responses, all of which were resounding "Thank yous". The students for the most part listened respectfully, and I felt my goals were met - which were to broaden their horizons and let them know that there are other viewpoints than YEC.
Now, if Novarre would just publish a Biology textbook. Sigh.
Thanks again, everyone! This has been a great experience for me.