In international large-scale assessments, students may not be compelled to answer every test item: a student can decide to skip a seemingly difficult item or may drop out before the end of the test is reached. The way these missing responses are treated will affect the estimation of the item difficulty and student ability, and ultimately affect…

Research to date on the effects of between-school tracking on inequalities in achievement and on performance has been inconclusive. A possible explanation is that different studies used different data, focused on different domains, and employed different measures of inequality. To address this issue, we used all accumulated data collected in the…

At an international level, teachers' work is increasingly circumscribed and regulated. Notions of accountability have shifted from primarily inputs to primary outcomes, and investment in strengthening teacher performance evaluation has expanded. At the same time, investment in enhancing the quality of teacher education programs is contested in…