The aim of this research was to take the opinions of teachers and principals to determine the ways to improve the quality of service in high schools in order to improve student satisfaction. This study tried to increase the awareness of teachers and principals about the quality in education and to provide their contribution to creating quality culture in high schools. In this study, a purposive sampling method was employed. Semi-structured interviews were conducted with 22 teachers lecturing at high schools and 10 school principals. The data was analysed through content analysis. The findings show that teachers emphasised the in-service training needs of teachers and school principals and principal duties of school guidance and counselling services, whereas school principals stressed the importance of usage by teachers of effective teaching methods; relations between students and principals, and relations between guidance and counselling services and teachers.