One-room schools were commonplace throughout rural portions of various countries including the United States, Canada, Australia, New Zealand, United Kingdom and Ireland in the late 19th and early 20th centuries. In most rural (country) and small town schools, all of the students met in a single room. There, a single teacher taught academic basics to five to eight grade levels of elementary-age boys and girls.
The quality of facilities at one-room schools varied with local economic conditions, but generally, the number of children at each grade level would vary with local populations. Most buildings were of simple frame construction, some with the school bell on a cupola. In Midwestern states, sod construction was also used, as well as stone in areas such as portions of the southwest where trees were scarce. In some locations, the schoolhouse was painted red, but most seem to have been white.
The blackboard really is a black board, made of wide boards painted black. It was not until much later that slate was used for chalkboards, although students often had individual slates for writing practice.