Omnibus is a classical Christian curriculum that combines history, literature, and theology. The first three years of Omnibus are designed for 7th-9th grade. Omnibus I covers ancient history through the fall of Rome. Omnibus II covers the early church through the Reformation while modern US and British history are taught in Omnibus III. Omnibus IV-VI are designed for 10th-12th grade. They cover the same topics as Omnibus I-III, but at a higher level. Read more about the curriculum on their website.