ɐ bˈuːm pˈiəɹɪəd ɪnðə nˈaɪntiːnhˈʌndɹɪd sˈɛvənti z sˈɔː ðə skˈuːl ɛkspˈænd, wɪððə dʒˈuːnjɚ skˈuːl mˈuːvɪŋ tʊ ɐ nˈuː kˈæmpəs ɪn ɡɹˈeɪ stɹˈiːt, dˈiːkɪn, tə kˈeɪɾɚ fɚɹə sˈɜːdʒ ɪn ɛnɹˈoʊlmənts.
A boom period in the 1970s saw the school expand, with the Junior School moving to a new Campus in Grey Street, Deakin, to cater for a surge in enrolments.