Abstract
This paper reveals the modification of the Music Appreciation Hour's early programs gaining the character of educational broadcasting, and focuses on the transition of the program format. The Music Appreciation Hour was a Damrosch music appreciation program and the first national School of the Air. The program format of the Music Appreciation Hour for the season of 1928-29 was based on Damrosch's concert for children. His concert for children was organized to present information of the same nature in each program. The program format for the season of 1928-29 had the same nature in all four series inasmuch as these programs focused on musical instruments. On the contrary, the subjects in the season for 1930-31 differed in each series. Therefore, each series was supposed to be listened to in sequence. The program for the season of 1930-31 led to the 'serial' nature (within each series) of educational broadcasting by changing their program format to deal with different subjects in each series.
