Be sure to review the "Parents" tab on each school's website. The "Forms & Resources" webpage has a lot of important information and resources, including textbook fees.
For quick reference, here are the links to those pages on each website:
Mt. Vernon High School - Parents - Forms & Resources Page
Mt. Vernon Middle School - Parents - Forms & Resources Page
Fortville Elementary School - Parents - Forms & Resources Page
McCordsville Elementary School - Parents - Forms & Resources Page
Mt. Comfort Elementary School - Parents - Forms & Resources Page
Mini-Marauder Preschool - Parents - Forms & Resources Page