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To cite this article: Perry den Brok , Dolly van Eerde & Maaike Hajer (2010) Classroom interaction studies as a source for teacher competencies: the use of case studies with multiple instruments for studying teacher competencies in multicultural classes, Teachers and Teaching: theory and practice, 16:6, 717-733To link to this article: http://dx.Dealing with ethnic and linguistic diversity is one of the major challenges in today's education. Therefore, the formulation of competencies for teachers and teacher training should take into account the specific requirements of teaching in multicultural schools. In 2002, a series of small-scale studies were conducted to identify and formulate teachers' communicative competencies in multicultural classes through a mixture of instruments and data sources. The studies aimed at providing recommendations for improving these competencies through teacher education and professional development. This study reports on the multiple instruments used to study the practical knowledge and behaviour of experienced teachers in multicultural schools by discussing research evidence from a series of case studies from primary and secondary education. These case studies explored teachers' knowledge, beliefs and behaviours in creating healthy teacher-student relationships as well as making lesson content accessible for all students, including students with limited language skills. The findings show how small-scale studies with multiple data collection techniques can help in providing an empirical foundation for the formulation and specification of teacher competencies in multicultural settings. Based on our findings, we argue that by conducting multiple investigations in different settings, using a variety of instruments and by interpreting this data from different communicative domains, a valid, reliable and complete picture of teachers' scientific competencies can be obtained.

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Explicit language objectives are included in the Swedish national curriculum for mathematics. The curriculum states that students should be given opportunities to develop the ability to formulate problems, use and analyse mathematical concepts and relationships between concepts, show and follow mathematical reasoning, and use mathematical expressions in discussions. Teachers' competence forms a crucial link to bring an intended curriculum to a curriculum in action. This article investigates a professional development program, 'Language in Mathematics', within a national program for mathematics teachers in Sweden that aims at implementing the national curriculum into practice. Two specific aspects are examined: the selection of theoretical notions on language and mathematics and the choice of activities to relate selected theory to practice. From this examination, research on teacher learning in connection to professional development is proposed, which can contribute to a better understanding of teachers' interpretation of integrated approaches to language and mathematics across national contexts.