Knorr contributed significantly to Jehovah's Witnesses, with an intense educational focus. Within a month of his taking office, arrangements were made for an Advanced Course in Theocratic Ministry, a school that featured Bible research and public speaking. On September 24, 1942, Knorr suggested that the Society establish another school to train missionaries for service in foreign countries. The suggestion was unanimously approved by the board of directors. The first class of the Gilead School - the name given to this missionary school - commenced February 1, 1943. Knorr arranged for the creation of new branch offices in many countries. In 1942, when he became president, there were 25 branch offices worldwide. By 1946, despite the events of World War II, the number of branch offices increased to 57. Over the next 30 years, the number of branch offices increased to 97. Knorr began a campaign of real estate acquisition in Brooklyn to expand the organisation's world headquarters, expanded printing production throughout the world, and organized a series of international assemblies that dwarfed those of Rutherford in the 1920s. In 1958, more than 253,000 Witnesses gathered at two New York City venues, Yankee Stadium and the Polo Grounds, for an eight-day convention where more than 7000 were baptized. Other large conventions were held in the US, Canada and Germany. The doctrine of not accepting blood transfusions was also introduced during Knorr's leadership.
Organizational adjustments
From October 1, 1972, adjustments began in the oversight of the congregations of Jehovah's Witnesses. The writing of Aid to Bible Understanding led to a new understanding of the Bible's mention of elders and "older men" and seems to have been the catalyst for the denomination to adjust its organizational structure. A revision to the Watchtower Society's organizational manual in 1972 explains, "it is noteworthy that the Bible does not say that there was only one 'older man', one overseer, in each congregation. Rather, it indicates that there were a number of such." There would no longer be one congregation servant, or overseer, but a body of elders and ministerial servants. One elder would be designated chairman, but all the elders would have equal authority and share the responsibility for making decisions. Later, the chairmanship of the Governing Body would also be affected, rotating in alphabetical order. In December 1975, leadership of Jehovah's Witnesses passed from the president of the Watch Tower Society to the Governing Body of Jehovah's Witnesses. Beginning January 1, 1976 the Governing Body formed several committees to oversee publishing, writing, teaching, service and personnel. Knorr worked with the new arrangement until illness shortly before his death forced his move from the world headquarters in Brooklyn, New York. Following Knorr's death in June 1977, Frederick William Franz succeeded him as corporation president.
Publications
Some of the publications used by Jehovah's Witnesses which were released during Knorr's stewardship were:
