Much cultural capital research has accumulated since its inception in the 1970s and researchers have charted the corresponding development of cultural capital theory in academic communities. This empirical study takes the further step of offering an account of cultural capital as it is interpreted in schools. This 'interventionalist account' is based on classifications of practices that had been explicitly implemented at 14 secondary schools in England in order to give students access to cultural capital. The collection of cultural capital practices was compiled from 38 interviews with senior leaders, teachers, and support staff. Practitioners justifiably believed these practices to be supported by research evidence. It was found, however, that a wide variety of cultural capital practices exist in schools today, with limited support from research evidence and theory. I discuss how the 'evidence pipeline' has broken down in this case and is sometimes an inappropriate metaphor for conceptualising research dissemination.