PARENTS and schools should improve their communication and further co-operation to help solve the problems of youth, said Legislative Councillor Tik Chi-yuen at the Queen Elizabeth Secondary School speech day. ''Schools and parents have long been blaming each other for not shouldering the responsibility for the welfare of children. They lack proper channels of communication,'' he said. ''I hope parents and schools can establish a positive relationship of trust for the benefit of the young.'' Mr Tik said one of the main hindrances to building links between the two groups was that many parents lack the motivation to take part in school activities. He stressed that parents' participation showed their support for the school. He said schools should also adopt an open attitude towards parents' participation. ''Some schools fear that parents' participation would interfere too much with school administration and policies. I think these fears are unfounded. Their participation can exert a positive influence on the school and children,'' Mr Tik said. Mr Tik added that in a complex society like Hong Kong, young people needed proper assistance in the face of difficulties and that extra care from teachers and parents was indispensable. Principal Chan Ping-tat detailed the high standard achieved by students in public examinations. ''Among the 56 Form Seven students who took the 1993 A-level examination, 52 were admitted to local universities and Government-funded tertiary institutions,'' Mr Chan said. ''The results of the HKCEE were equally encouraging with a 98.65 per cent pass rate.'' The students had also performed well in extra-curricular activities and inter-school competitions. After being presented the first-class award by the International Mathematic Olympiad Hong Kong Committee, sixth former Tsui Ka-hing brought glory to Hong Kong by winning a bronze at the International Mathematic Olympiad held in Turkey. In sports, the school's girls' and boys' volleyball teams won the Division One and Two (Kowloon area) volleyball competitions.