 Terreblanche lectured at the University of the Orange Free State for eight years.He returned to lecture at Stellenbosch University from 1968 until his retirement in 1995.In the 1980s, whilst still a prominent member of the National Party, a member of the Afrikaner Broederbond and a "Hoofwag" of the Ruiterwag, Terreblanche in 1985 established the "Discussion group '85" at Stellenbosch.