In 1873, a brick structure known as "No. 3" was built to house the Olive Branch School, for grades 4 through 8. In 1878, the Legislature of Ohio passed a law authorizing township Boards of Education to establish a school of higher grade than a common school. Courses taught at the school included Latin, Algebra, Geometry, Science, and others. Some of the repairs mandated by the State Inspector were completed that year, and the Bethel Township Board of Education spent the next six years discussing whether to continue repairs or to construct a new building. The building was destroyed when a boiler in the basement caught fire on November 10, 1913. The brick building which last housed Olive Branch High School then became Olive Branch Junior High School (grades 7 through 9), and in 1981 became Olive Branch Middle School (grades 6 through 8), before being demolished and replaced by Tecumseh Middle School in 2007. Meanwhile, in the 1950s and early 1960s, the "little round" building was used for overflow, temporarily housing classes from Tecumseh High School. In 1963, the building was used as an overflow elementary school, and then for art classes. In 1972, it ceased housing classes, and since then the well-maintained building has been used for storage. The building was placed on the
National Register of Historic Places in July 2009 and was rededicated at a ceremony in January 2010. As of 2010, funds were being sought to restore the building as a museum and board office. ==Notable alumni==