In 1882, Simpson began informal training classes in order to reach "the neglected peoples of the world with the neglected resources of the church". By 1883, a formal program was in place and ministers and missionaries were being trained in a multi-cultural context (This school was the beginning of Nyack College and Alliance Theological Seminary). In 1889, Simpson and his church family moved into their new home at the corner of 44th St. and 8th Av. called the New York Tabernacle. This became the base not only of his ministry of evangelism in the city, but also of his growing work of worldwide missions.