The school’s name was changed to Mara Hills Elementary School.
Because it was a boarding school, students would study for three months and spend one month at home. Students transferred to other schools after middle school because the school only went through eighth grade. Growth became so rapid that the Mennonite Mission Board authorized a land purchase in Nairobi, Kenya, a more central location with better health care and access to air travel. The Mission Board approved the purchase of a 20-acre coffee plantation on the outskirts of Nairobi.
The Mennonite Board in East Africa opened Rosslyn Academy in August 1967 following the American educational system. The Board soon added ninth grade when the Southern Baptist missions joined in August 1975. In 1986, the dorm closed, and Rosslyn became a day school. The Assemblies of God joined in February 1988 to support the development of a high school.