Private tutoring (PT) is a widespread educational phenomenon that blurs the conceptual boundaries of public and private education and can affect the formal school system and teachers’ work. This study examined whether participation in PT and the estimation of private tutors’ contributions are related to pupils’ attitudes towards teachers’ effectiveness. Based on a questionnaire administered to all pupils (n = 855) from Grades 7 to 10 from one secondary school located in an affluent area at the centre of Israel (respondence rate, 83.2%), it was found that overall, there were few differences in students’ attitudes between participants in PT compared to those who did not participate in PT. However, among those who participate in PT, their attitudes towards school teachers are related to the distinction between the academic and social‐affective contribution of private tutors. When PT is related to academic spheres, it enhances positive attitudes towards school teachers and when PT is related to socio‐affective aspects, it increases criticism. The findings highlight the complex interactions of PT with mainstream education and emphasise the challenges school teachers face in view of the trend for more personalised learning approaches.