Empirically, the link between classmate ability and individual-level student achievement has been established. And yet, within the scope of this body of literature, there is a dearth of studies examining if a relationship also persists between classmate ability and non-achievement outcomes--that is, social skills. This article fills this research…

Within comparative school effectiveness research facilitated by large-scale data across countries, this article presents the results of the testing for measurement invariance of the latent concept of Professional Community (PC) across 23 European countries and more than 35,000 teachers in secondary schools. The newly proposed Multiple-Group Factor…

A goal in many countries is to institute state-wide exams to base student assessment more firmly on norms for all classes. This raises the question as to the extent to which greater standardization of grading practice can be reached by implementing state-wide exit exams. Since there is a lack of longitudinal studies, we analyzed the effect of the…

In this commentary, the 3 review papers by Reynolds et al. (this issue), Muijs et al. (this issue), and Hopkins, Stringfield, Harris, Stoll, and Mackay (this issue) on "educational effectiveness", "teaching effectiveness", and "school and system improvement" are discussed. In the text, the 3 papers are occasionally…

The media suggest that accountability pressure increases teacher stress and drives teachers away from teaching, resulting in teachers leaving disadvantaged schools that serve larger proportions of poor and minority students. However, no prior work has systematically examined the changes in the national trends of teacher turnover in response to No…

In this paper, we investigated whether student reading comprehension could be improved with help of a teacher Professional Development (PD) program targeting goals, data use, and instruction. The effect of this PD program on 2nd- and 3rd-grade student achievement was examined using a pretest-posttest control group design. Applying propensity score…

In educational effectiveness research, multilevel data analyses are often used because research units (most frequently, pupils or teachers) are studied that are nested in groups (schools and classes). This hierarchical data structure complicates designing the study because the structure has to be taken into account when approximating the accuracy…

Instability in the school population between school entrance and school leaving is not "just a problem of missing data" but often the visible result of the educational problems in some schools and is, therefore, not merely to be treated as missing data but as indicator for the quality of educational processes. Even the most superior…