When determining whether or not children have a difficulty in learning, the quality of instruction they have received during their school career must be excluded as a possible explanation for their lack of progress. To this end, educational psychologists (EPs) have for some time adopted a model of response to intervention known as assessment-through-teaching (ATT). This article describes an ATT intervention with three low achieving Year 4 students within a single primary school in the UK. Learning outcomes were monitored during a six-week half-term and views of both students and teachers on the intervention were investigated. The intervention group improved their performance in reading accuracy compared to the comparison group, whereas both groups performed less well on post-intervention scores of reading comprehension and motivation, although the decline in the performance of the intervention group was less than the comparison group. Both teacher and student views were positive about the intervention.