Riding – Physical Education, Social Studies (if exposed to the many different styles beyond merely English and Western)
Training – Science (animal behavior), Occupational Education, Social Studies (training methods vary from culture to culture)
Anatomy – Science
Stable Management – Occupational Education
Care of Horses – Occupational Education
Horses in Popular Culture and Mythology – Social Studies
Horses in History – covers a huge chunk of human history across a wide spectrum of cultures
Equine Issues (mustangs, use in stunt work, use in racing, etc.) – Social Studies
Horses in Literature – Reading
Horse Breeds – History, Science (genetics), and Social Studies