Recently, the number of education programmes addressing person-centred approaches to long-term residential dementia care has increased, and nursing assistants (NAs) are often the target audience. The effectiveness of employee education programmes is actively debated, and our objective is to contribute to this discussion by exploring the knowledge NAs acquire through practice. We examined approaches to person-centred care generated during a series of interviews with NAs, and compared these to the content of five frameworks for person-centred dementia care. Our results suggest that although NAs acquire significant knowledge about person-centred dementia care during the course of their work, application of person-centred care strategies varies across NAs. We propose ways of enhancing NA education in order to address gaps in knowledge. We also recommend sustained attention to organisational factors that contribute to variability in practice.