One-room schoolhouse

One-room schools were commonplace throughout rural portions of various countries, including Prussia, Norway, Sweden, the United States, Canada, Australia, New Zealand, the United Kingdom, Ireland, and Spain. 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 several grade levels of elementary-age boys and girls. While in many areas one-room schools are no longer used, it is not uncommon for them to remain in developing nations and rural or remote areas. Examples include remote parts of the American West, the Falklands, and the Shetland Islands.

Prussia (compare Prussian education system) was among the first countries in the world to introduce a tax-funded and generally compulsory primary education for either boys and girls. In comparison, compulsory schooling in France or Great Britain was not successfully enacted until the 1880s. The state sponsored system was introduced in the late 18th century and has had widespread influences since. The first Prussian schools were simple one-room schools, however already as of 1773 Friedrich Eberhard von Rochow set up a model school with primary education in two age related classes.

In Ireland, free primary education was mandated in 1831, prompting the establishment of many single-teacher National Schools across rural areas, most initially using a room in an existing building. By the 1850s there was a school in every parish. Most extant one- and two-room school buildings date from the decades after 1891 when primary education became compulsory. Most of those still in use today have been extended following merger with neighbouring schools. Since 2002, any state-funded school with at least 10 pupils is entitled to at least 2 teachers; the 21 schools which fell below this threshold are located on offshore islands. In recent decades, an increasing number of schools have been founded for parents not content with the National School system. These include Gaelscoileanna (which teach through Irish rather than English) and multi-denominational schools (most Irish schools are controlled by one or other of the main Christian churches). Although such schools eventually become eligible for state funding, they usually begin with a single teacher in a room or prefabricated building.

...
Wikipedia