Instructional coaching is an attractive alternative to one-size-fits-all teacher training and development in part because it is purposefully differentiated: programming is aligned to individual teachers’ needs and implemented by an individual coach. But, how much of the benefit of coaching as an instructional improvement model depends on the specific coach with whom a teacher works? Collaborating with a national teacher training and development organization, TNTP, we find substantial variability in effectiveness across coaches in terms of changes in teachers’ classroom practice (0.43 standard deviations). The magnitude of coach effectiveness heterogeneity is close to average coaching program effects identified in other research. These findings suggest that identifying, recruiting, and supporting highly skilled coaches will be key to scaling instructional coaching programs.
There is broad consensus across academic disciplines that access to same-race/ethnicity teachers is a critical resource for supporting the educational experiences and outcomes of Black, Hispanic, and other students of color. While theoretical and qualitative lines of inquiry further describe a set of teacher mindsets and practices aligned to “culturally responsive teaching” as likely mechanisms for these effects, to date there is no causal evidence on this topic. In experimental data where upper-elementary teachers were randomly assigned to classes, I find large effects upwards of 0.45 standard deviations of teachers of color on the short- and longer-term social-emotional, academic, and behavioral outcomes of their students. These average effects are explained in part by teachers’ growth mindset beliefs that student intelligence is malleable rather than fixed, interpersonal relationships with students and families, time spent planning for and differentiating instruction for individual students’ needs, and the extent to which teachers lead well-organized classrooms in which student (mis)behavior is addressed productively without creating a negative classroom climate.