 In 1960, Massad opened up a new division called Prozdor (a preparatory program for the Machon) for 15-year-old campers.In the 1950s and 1960s, Massad drew the majority of its campers from the Talmud Torahs and day schools in New York, admitting mainly campers with Hebrew educational backgrounds The bulk of the camp populations came from the centrist Orthodox community, especially from the students of the Ramaz School and Flatbush Yeshivot.The Massad camps had their largest camper enrolment in the 1966-68 summers, with 914 campers in 1966, 937 in 1967, and 925 in 1968.