A legislator last night said he was puzzled by the commission's move to investigate the effectiveness of primary education, which he said was beyond its jurisdiction. Democrat Cheung Man-kwong was commenting on the commission's value-for-money report on the delivery of effective primary education and administration of primary schools. The commission raised concerns, among others, over the weight of schoolbags, scheduling of school holidays, provision of extra-curricular activities, setting up of parent-teacher associations at schools, and lack of longer-term planning by schools. It surveyed 490 pupils and found a third of them carried schoolbags which were at least 15 per cent heavier than their body weights. It also recommended spacing school holidays more evenly throughout the year. Mr Cheung said: 'I cannot see how the weight of schoolbags can be related to good value-for-money service. 'It should be dealt with by the Education Department. But now it seems the Audit Commission is trying to do another education reform.' Lui Wing-yee, the headmaster of SKH Kei Hin Primary School in Ngau Tau Kok, said she did not see heavy schoolbags as a major problem in terms of value-for-money. The Education Department said in a statement last night that it would be reviewing the distribution of school holidays and the impact on teacher workload, the professional development of teachers and the quality of education.