In this paper, we aim to explore and exemplify what opportunities to develop disciplinary reading literacy students are given access to in particular types of classroom reading environments in social science subjects. The investigation focuses on how the teacher organizes activities around reading, on what content is approached in text-related discussions and on whose perspectives are allowed space in the classroom discourse. The empirical data consists of classroom observations from two classes in year five and two classes in the Swedish upper secondary school, using different approaches to teaching reading, one being Reading to Learn. With a theoretical base in systemic functional linguistics (SFL), dialogism and reception theory, the classroom discourse was analysed in terms of sequential reading stages, text movability and dialogicality. The findings reveal how differently organized reading environments provide different support structures for students’ disciplinary reading. For example, the findings indicate that text activities that support the reading process in several stages bring about a larger potential for the development of reading literacy. However, the picture changes depending on to what extent students are given room to express their reception of the text, and thereby contribute to an active understanding of text in a dialogical classroom.