Hierarchical organization of schooling in all nations insures that international large-scale assessment data are multilevel where students are nested within schools and schools are nested within nations. Longitudinal follow-up of these students adds an additional level. Hierarchical or multilevel models are appropriate to analyze such data. A…

Using data from the 2006 Program for International Student Assessment (PISA), we explored nine aspects of science engagement (science self-efficacy, science self-concept, enjoyment of science, general interest in learning science, instrumental motivation for science, future-oriented science motivation, general value of science, personal value of…

This study examines one part of a validity argument for portfolio assessments of teaching practice used as an indicator of teaching quality to inform a licensure decision. We investigate the relationship among portfolio assessment scores, a test of teacher knowledge (ETS's Praxis I and II), and changes in student achievement (on…

In 2003, about 50 countries including Ghana participated in the Trends in International Mathematics and Science Study (TIMSS). This is the first time that Ghana has participated in an international mathematics assessment that has provided the reliable data to examine equity and the quality of mathematics education within schools in Ghana. In the…