Sunday, December 28, 1919

Beautiful bright cool day. Up 9 A.M. Chored around. Down to Hayes' room and studied S.S. lesson. To Church & S.S. Walked to car with D.W.S. Home to dinner. Out walking with Hayes. Took nap. To Epworth League. Home with Doris. To bed 10:30 P.M.

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Lest anyone think that Sunday School lessons were a haphazard or ad hoc affair left up to individual church congregations, I found this information on the internet that attests to the careful calculation that went into creating Sunday School lessons:

The General Conference of 1912 made it the duty of the Board of Sunday Schools to determine the curriculum for Methodist Sunday schools. In harmony with that action the Board created a "Standing Committee on Lesson Courses." The publishing agents, representatives of the Editorial Office, the chairman of the Lesson Course Committee and the corresponding secretary of the Board met on November 20, 1913, to consider lesson courses. They passed the following resolution:

In view of the fact that the General Conference of the Methodist Episcopal Church has made it the duty of the Board of Sunday Schools to determine the lesson courses for our denomination, and since that Board is engaged in the preparation of such courses, it is the sense of the representatives that at the conclusion of the preparation of the present cycle of uniform lessons (1912-1917) the Methodist Church should assume full responsibility for the preparation of lesson courses to be used in its Sunday Schools. 

Concerning the future policy of our denomination, we express the desire and purpose to cooperate, so far as practicable, with all evangelical denominational agencies engaged in the preparation of lesson courses to the end that a curriculum may be created that will fully meet the demand for lessons in harmony with the progress being made in the field of religious education, especially as illustrated in the spirit of interdenominational cooperation expressed in the organization of the Sunday School Council of Evangelical Denominations, the Federal Council of Churches of Christ in America, and other representative movements.

These passages were taken from a website called Forgotten Books. The book is The History of the Sunday School Movement in the Methodist Episcopal Church, by Addie Grace Wardle, published in 1918. But such educational oversight continues today, as you can see at the official website for the Methodist Church's General Board of Discipleship.