Complex sentence: He was successful in reintroducing the Primary section to the school which was removed in 1957.This enable a large number of old boy's to send their son's to the school in which they had their education.
Split into simpler sentences: He was successful in reintroducing the Primary section to the school which was removed in 1957. This enabled a large number of old boys to send their sons to the school in which they had their education.