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This paper investigates the short- and long-term effects of both the home learning environment (HLE) and the teacher factors of the dynamic model of educational effectiveness upon student mathematics achievement. Written tests were administered to Grade 1 students (N = 1,444) of 48 primary schools at the beginning of Year 1 and at the end of Year 1, Year 2, and Year 3. A parent questionnaire measured student background factors and the HLE, whereas external observations measured the teacher factors. One aspect of the HLE (i.e., home learning materials) was associated with student achievement, not only at the end of Year 1 but also at the end of Year 3. Almost all teacher factors were associated with student achievement at the end of Year 1 and at the end of Year 3. The long-term effect of teachers was stronger than their short-term effect. Implications for research, policy, and practice are drawn. 31 1 50 79

This paper investigates the extent to which teacher behaviour in classroom affects student achievement gains in mathematics in Ghana. A representative sample of primary schools from three districts of the Upper East Region of Ghana was selected (n = 73) using stage sampling procedure, and written tests in mathematics were administered to all grade six students at the beginning and end of school year 2013–2014. Two observation instruments and a student questionnaire were used in collecting data on quality of teaching. Multilevel analyses revealed that teacher factors are associated with student learning outcomes. Implications for promoting quality in education are drawn. © 2016 Elsevier Ltd 51 51 61

This paper investigates the impact of national policies for improving teaching and the school learning environment (SLE) on student achievement. In each participating country (i.e., Belgium/Flanders, Cyprus, Germany, Greece, Ireland, and Slovenia), a sample of at least 50 schools was drawn and tests in mathematics and science were administered to all Grade 4 students (N = 10,742) at the beginning and end of school year 2010–2011. National policies were measured through (a) content analysis of policy documents, (b) interviews with policymakers, and (c) head-teacher questionnaires. Multilevel analyses revealed that most aspects of national policies for teaching and SLE were associated with student achievement in each subject irrespective of the source of data used to measure them. Implications are, finally, drawn. 29 2 171 203

Background. The dynamic model of educational effectiveness (DMEE) is a comprehensive theoretical framework including factors that are important for school learning, based on consistent findings within educational effectiveness research. Purpose. This study investigates the impact of teacher and school factors of DMEE on mathematics and science achievement, and identifies factors with equalising qualities in terms of helping low-achieving student groups to catch up with their better-achieving peers. Sample. Data were retrieved from a large-scale, longitudinal project conducted in 571 classes in 334 schools in 6 European countries (Belgium/Flanders, Cyprus, Germany, Greece, Ireland and Slovenia). In each country, a sample of about 50 schools was drawn, and tests in mathematics and science were administered to all grade 4 students (N = 10,742) at the beginning and end of school-year 2010–2011. Design and methods. Data on teacher factors were collected through student questionnaires, and data on school factors were collected through teacher questionnaires. Two-level regression models were applied. Interaction effects between the factor and the group composition were estimated, while controlling for prior achievement. Results. Our results confirm the importance of most tested teacher factors (except for modelling and qualitative structuring) and all tested school factors of DMEE for effective math and science education. The majority of these factors appear to make an even greater difference for low-achieving student groups. Conclusions. Our results provide further validity to DMEE at classroom and school level, and indicate that most factors make a greater difference for low-achieving student groups. Thus, effective teaching is an important aspect for reducing the achievement gap. This illustrates the importance of placing the most effective teachers in schools with the highest percentage of underachieving students. Policy should encourage good teachers to teach in low-achieving schools by making these jobs more attractive, both financially and in terms of work conditions. 31 2 183 211