Learn more about Collective Teacher Efficacy, which enjoys an effect size of 1.57.
Collective Teacher Efficacy is the collective belief of teachers in their ability to positively affect students.
With an effect size of d=1.57 Collective Teacher Efficacy is strongly correlated with student achievement.
Overview
Collective Teacher Efficacy's (CTE) effect size of d=1.57 is huge: it is more than two times bigger than that of feedback (d=0.72), and almost three times bigger than the effect of classroom management (d=0.52).
The message seems to be clear: together teachers can achieve more, especially if they collectively believe that they can do so!