This article examines the objective possibilities of Swedish schools to offer an equal and functional pedagogical practice for students' acquisition of knowledge and skills. The data consist of policy documents, observations, and interviews with students, teachers, and head teachers in three educational settings distinguished by different social demographics. The focus allows for a comparative understanding of how tangible objects generate formations of schools as a relational phenomenon depending on geographic location and social background of students. The article indicates that the impact of materiality lies in its preceding power. It shapes the condition of institutions visualised in architecture, buildings, and the quality of and design of facilities and artefacts. From this material root emanates schools' values, appeal, social status, and pedagogical organisations--school effects--that empower or weaken the school's attraction and self-confidence. Different materialities influence each school's institutional habitus, producing school effects with unequal educational outcomes.