LEADER GROUP SIZE — 1:14
Factoid: A study of both Yoido Full Gospel Church and Young Nak Presbyterian Church, both in Seoul, also indicates that, as teacher-pupil ratios are relaxed and small groups become larger, the growth plateaued. When, however, the ratio was reduced, growth continued. The teacher-pupil ratios tend never to exceed 1:25, and most average 1:14 or even smaller for the individual congregations.
Source: (John N. Vaughn, “Trends Among the World’s Twenty Largest Churches,” ch. 12 inWagner, C. Peter, ed. Church Growth: State of the Art. Wheaton, IL: Tyndale, 1986, p. 132. )