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By 1960, grades 9 through 12 were added and the “sixties and early 1970” saw the American School student enrollment mushroom to a seemingly staggering 1,400 by May of 1973. Growing pains were just beginning however, and during the past two years an additional population explosion has occurred and this year the Tehran American School will become the largest overseas school in the world with an enrollment of over 3,000 students.
