MORE than half the students interviewed in a recent survey claimed pupils in their schools were triad members. The figures were revealed in a petition presented by the Tsing Yi Concern Group to legislators yesterday. Group representative and district board member Kwong Fok-sang said that of the 7,500 students questioned at 42 schools in Tsuen Wan, Kwai Chung and Tsing Yi, more than 50 per cent believed they shared classrooms with triad members. The poll was conducted in May by the Survey Study Group of the Association of Heads of Secondary Schools. More than 20 per cent also claimed they had contact with schoolmate triad members. Another 26.1 per cent said they had friends outside school who were involved in triads, Mr Kwong said.