Concord Series Song Books for Schools, Teacher's Editions for Grades IV, V, and VI and VII, VIII, and IX, 1920s

A lovely set of two Teacher's Editions of the Concord Series Song Books for school use from the 1920s! 

Concord Series No. 14: A Book of Songs For Unison and Part Singing for Grades IV, V, and VI, Teacher's Edition. 1924

Concord Series No. 15: Concord Junior Song and Chorus Book (Boys and Girls) for Unison and Part Singing for Grades VII, VIII, and IX. 1928. 

Both books are "Compiled and Edited for Use in School and Home by Archibald T Davison, Thomas Whitney Surette and Augustus D. Zanzig ".

These hardcover books are both in good condition.