- Australian education researcher John Hattie’s latest update to the Hattie Ranking, which incorporates the results of 1,200 meta analyses, places teacher estimates of achievement as the highest-impact influence on student learning and achievement.
- Visible Learning writes the Hattie Ranking has gone from a list of 138 effects to 195 since 2009, and the most recent update includes the addition of teacher estimates of student achievement as well as the second highest-impact influence: collective teacher efficacy.
- With an average effect size of 0.4, Hattie finds the effect size of teacher estimates of achievement is 1.62 and the effect size of collective teacher efficacy is 1.57.
The latest Hattie Rankings highlight the critical role teachers play in student achievement. Research has long shown teachers have lower expectations for students from low-income families and black students, generally. A recent study out of Brown University found boys and girls who start school with the same behavior problems end up in markedly different places down the line. Boys in this group have lower test scores and lower graduation rates, indicating teachers respond differently to bad behavior based on gender.
The growth mindset has evolved as a way for teacher to focus on student potential, rather than their deficits. To embrace the growth mindset, teachers must acknowledge their biases and learn to put them aside in the classroom.