Materials Recommendations for a Creo Parametric course for local High School Students

I'm a mechanical engineer who's been using Creo Parametric (formerly Pro/ENGINEER) for over 20 years.  If I were to start a beginner level Creo Parametric course for local High School students, what free training materials (from PTC or other) - books, PDFs, online tutorials - would you recommend we use?  Also, any idea who at PTC might be willing to provide support in this endeavor?  Got an email address for them?  Any comments regarding students using self-paced online Creo Parametric training with or without an instructor/mentor in the same room?