The township's students had been educated at Johnsonburg School from 1917 to 1956. The current school building opened in September 1956, after which the original Johnsonburg School was repurposed for use as the municipal offices for Frelinghuysen Township. The district had been classified by the
New Jersey Department of Education as being in
District Factor Group "GH", the third-highest of eight groupings. District Factor Groups organize districts statewide to allow comparison by common
socioeconomic characteristics of the local districts. From lowest socioeconomic status to highest, the categories are A, B, CD, DE, FG, GH, I and J. ==Schools==