This paper argues for the value of using student ratings to measure quality of teaching. An international study to test the validity of the dynamic model of educational effectiveness was conducted. At classroom level, the model consists of eight factors relating to teacher behaviour: orientation, structuring, questioning, teaching modelling, application, management of time, teacher role in making classroom a learning environment and assessment. In each participating country (i.e. Belgium/Flanders, Cyprus, Germany, Greece, Ireland and Slovenia), a sample of at least 50 primary schools was used and all grade 4 students (n?=?9967) were asked to complete a questionnaire concerning the eight factors of the dynamic model. Structural equation modelling techniques were used to test the construct validity of the questionnaire. Both across- and within-country analyses revealed that student ratings are reliable and valid for measuring the functioning of the teacher factors of the dynamic model. Implications for teacher education are drawn.