Recently in this journal, Sciffer, Perry, and McConney (2020) argued that school socioeconomic-background (SES) compositional effects are important for both research and policy. In response, this commentary argues that realistic school SES effects can only be identified in properly specified models. Otherwise, the estimated school effects are very…

The paper examines the influences on, and consequences of, low achievement defined as scores within the lowest achievement quartile. Low achievement is moderately associated with socioeconomic background and Indigenous status and the relationships with gender, ethnicity, region, family type, state and region differ for reading and mathematics. Low…