. Recent evidence from North Carolina suggests that increases in Limited English students' concentration have led to a slight … decline in performance solely for students at the top of the achievement distribution. The heterogeneous peer effects by …. Utilizing fixed effects methods that allow us to address possible endogeneity with respect to the schools' students attend, we …

and white males are lowered by nontrivial amounts when class sizes rise above 49 students. The grades of white females are …

students is assessed and a substantial gap between them revealed. Standardized test scores as well as the fraction of students … students with similar home environments from the same school and class, the ethnic gap in test scores is found to be … additional role in that regard. The unequal distribution of Roma students in schools and classes is found to be explained …

We examined the persistence of teacher effects from grade to grade on lower-performing students using high …-quality experimental data from Project STAR, where students and teachers were assigned randomly to classrooms of different sizes. The data … consistently indicated that all students benefited similarly from teachers. Overall, systematic differential teacher effects were …