This paper outlines the course, Essentials of Online Teaching, at Penn State's World Campus. The course leverages the Community of Inquiry (CoI) model to quickly develop effective online instructors by focusing on four key behaviors: communication, facilitation, feedback, and fostering a climate of belonging. The course aims to address the needs of instructors new to online teaching, helping them improve student community and retention. Institutions with well-designed courses that meet quality assurance criteria for course design but face the challenge of quickly developing effective online instructors may find this approach valuable for replication or adaptation.