The Internet School of Orthodox Studies Fall 2005 series of ten 90-minute educational classes are intended to provide Christians the opportunity to examine the scriptural and ethical directives of the Great Canon (chanted during the fifth week of Great Lent). Each week a different canticle of the Great Canon will be studied. This series is presented by Rev. Dr. Frank Marangos.
Established by the Department of Religious Education in 1998, ISOS ran through the Fall of 2005 as a means to assist Orthodox Christians to better understand the teachings of the Orthodox Church. These classes have all been archived on the goarch.org website with the assistance of the Archdiocese Department of Internet Ministries.