Large scale educational assessments conducted in the United Arab Emirates (UAE) show a substantial gap between the performance of different types of schools. This study used the 2015 Program of International Student Assessment (PISA) to investigate how student- and school-related variables accounted for the variation among schools. The results…

Background: Fair comparisons of educational systems in large-scale assessments can be made only if the differences in curricula have little impact on the outcomes. This study investigated the sensitivity of science achievement rankings to varying degrees of curriculum implementation in the Trends in International Mathematics and Science Study…

While professional development has been emphasised in many countries, few comparative studies have examined the degree of teachers' participation in professional development and its effect on teachers. Using the TIMSS 2007 data, this study analyses to what extent teachers participated in professional development in 50 TIMSS countries and examines…

The purpose of this study was to explore the effects of "yutori" reforms on Opportunity to Learn (OTL), as defined by Stevens' (1993, 1996) multidimensional framework, and to examine how the changes in OTL may have subsequently affected Japanese 8th graders' mathematics achievement as measured by the Trends in Mathematics and Science…