Sister Betty McMahon, founding Principal, St Therese Primary School Sadleir (the public housing estate known as Green Valley) from 1967-1984. Participated in an oral history on this day with Therese Sweeney. Following her time at Sadleir, Betty moved to Burradoo to run the Spirituality Centre at Kerever Park, Sacred Heart Order. Betty currently resides in Canberra with her dog Isabella.