Mrs. Dyer (Dyar?) had an upright piano permanently mounted on a little four-wheel furniture dolly, and she pushed it from classroom to classroom for our lessons. Occasionally, older elementary boys would be given the privilege of pushing it for her. She accompanied and directed us from a standing position. In my last year or two of elementary school, I remember us going to the gym/stage area to join her for Music class, instead of her coming to us. She was the entire elementary school Music department. When one moved up to Junior High in 7th Grade, you could take Band. The Band Director was the whole Music department for the next six grades, as I recall.
And so it is that most of the hymns I knew as a child (other than Christmas songs) I learned in either public school music class or Scout camp chapel services. The only songs I remember learning in church as a child were the Gloria Patri and the Doxology. When I went to seminary, I remember learning “To God be the glory, great things he hath done” as a new hymn.