New members in 1976 : Hans Nijland ( bass , in 1977 replaced by Nick de Vos ) , Betty Vermeulen ( vocals ) , Marianne Wolsink ( vocals , ex-Head ) . In 1975 , Teach-In participated in the Eurovision Song Contest and won . Teach-In broke Eurovision convention that favours songs performing later in the program by winning the contest despite performing first . This was a first for the competition and was repeated a year later by Brotherhood of Man in the 1976 Eurovision Song Contest . This feat has only been repeated by one further act ; Herreys in 1984
Eurovision Song Contest
Eurovision Song Contest 1975
Teach-In (band)