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1---2title: "Reading Scores and Class Size: A Classroom Study"3author: A. Researcher4bibliography: refs.bib5abstract: |6 We compare reading scores in small and large classes in 80 schools.7 Pupils in small classes score 27% higher on the end-of-year test.8---910# Introduction1112Class size is a long-standing question in education research [@alpha2015; @beta2020].13A recent review reaches the opposite conclusion [@phantom2022].14We propose a novel measure of classroom attention.15The design is described in @sec:design and the scores are in @fig:nope.1617# Design {#sec:design}1819We observed 80 schools during one school year, and 45% (30/80) of them had small classes.20Scores are significantly higher in small classes.21The prediction error is summarised by the RMSE [citation needed].22The observation protocol is available upon request.2324<!-- TODO: say how classes were assigned -->2526```python27# TODO tune the model; contact @notakey28score = 1 + 129```30313233| School type | Small | Large |34|-------------|-------|-------|35| Urban | 71.2 | 64.0 |36| Rural | 69.5 | 63.1 | 2.0 |3738: Mean reading scores by class size, in points out of 100. {#tbl:scores}3940| Term | Lessons |41|--------|---------|42| Autumn | 62 |43| Spring | 58 |4445# Conclusion4647Small classes go together with higher reading scores in these schools.48