Attitudes 12 Study and teaching (Secondary) 8 Teachers 7 Refuse and refuse disposal 6 School management and organization 5 Students 5 Economic conditions 3 Educational leadership 3 Recycling (Waste, etc.) 3 School principals 3 Social conditions 3 Squatters 3 Academic achievement 2 Automobile parking 2 Children 2 Chinese language 2 City planning 2 City planning and redevelopment law 2 Consumer behavior 2 Consumers 2 Education 2 Education, Secondary 2 English language 2 Environmental aspects 2 Information technology 2 Islam 2 Job satisfaction 2 Law and legislation 2 Malays (Asian people) 2 Management 2