The study was a pilot intervention to develop Year 5-8 students' close reading and writing of literary texts using the T-Shape Literacy Model (Wilson and Jesson in Set Res Inf Teach 1:15-22, 2019). Students analysed text sets to explore how different authors use language to engender mood and atmosphere. The study used a single-subject design logic for repeated researcher-designed and a quasi-experimental, matched control group design for repeated standardised measures of reading and writing. Nine teachers and their classes participated. The schools were part of a large school improvement programme using digital tools and pedagogy to accelerate students' learning participated that the authors were research-practice partners in. The schools all served low socio-economic status communities and the majority of students were Maori (51%) and Pacific (28%). There was a large effect size on the overall score for the researcher-designed measure (effect size = 1.00) and for the close reading of single texts sub-score (effect size = 0.90). There was a moderate-to-high effect for students' identification of language features (effect size = 0.75) but no significant effect on their synthesis scores. Students in the intervention significantly outperformed matched control group students in the standardised writing post-test (effect size = 0.65) but differences for the standardized reading comprehension test were not significant (effect size = 0.15). Results overall suggest the approach has promise for improving the metalinguistic knowledge, literary analysis and creative writing of younger and historically underserved groups of students.