Designers have a limited selection of K-12 online course creation standards to choose from that are not blocked behind proprietary or pay walls. For numerous institutions and states, the use of the iNACOL "National Standards for Quality Online Courses" is becoming a widely used resource. This article presents the final phase in a three-part study to test the validity and reliability of the iNACOL standards specifically to online course design. Phase three was a field test of the revised rubric based on the iNACOL standards against current K-12 online courses. While the results show a strong exact match percentage, there is more work to be done with the revised rubric. [Note: The volume number (32) displayed on the PDF is incorrect. The correct volume number is v31.]