One of the most important contracts for Guilbert & Betelle were the schools of the South Orange and Maplewood School District in New Jersey, where they would eventually design all of the new school buildings up through 1930. The creation of the first school they built, The Marshall School, (named for retiring Board president James Marshall), was significant for both Betelle and the District.
In 1920 the District, under the direction of George E. Low, Chairman of the Building Committee, began an aggressive building program to meet the needs of a rapidly expanding student population. The existing buildings were cramped, hazardous (there were numerous fires over the years) and ill-equipped.
This was not a new realization, and indeed a number of strategically located parcels of land had already been tentatively selected for schools a number of years before. One of these, on Grove Road in South Orange, was determined to be the best location for the first school.