caa a22 4500 445345470 CHVBK 20180317142827.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10758-011-9176-z doi (NATIONALLICENCE)springer-10.1007/s10758-011-9176-z Erfjord Ingvald University of Agder (UiA), Kristiansand, Norway aut Teachers' Initial Orchestration of Students' Dynamic Geometry Software Use: Consequences for Students' Opportunities to Learn Mathematics [Elektronische Daten] [Ingvald Erfjord] This paper reports from a case study with teachers at two schools in Norway participating in developmental projects aiming for inquiry communities in mathematics teaching and learning. In the reported case study, the teachers participated in one of the developmental projects focusing on implementation and use of computer software in mathematics teaching. I study teachers' initial orchestration of dynamic geometry software (DGS) in mathematics teaching at lower secondary school. By utilising the notion of ‘instrumental orchestration' from the theoretical perspective known as the ‘instrumental approach' (Drijvers et al., in Educ Stud Math 75:213-234, 2010; Trouche, in Int J Comput Math Learn 9:281-307, 2004), I examine how teachers in their initial teaching with DGS empower students' mathematics learning with the DGS software. According to this perspective, it involves teachers' orchestration of two interrelated processes instrumentation and instrumentalisation. Analytical findings indicate that a difference in teachers' empowerment is evident and consequences for students' opportunities to engage with mathematics represented by the DGS are presented. Springer Science+Business Media B.V., 2011 Dynamic geometry software nationallicence Instrumental orchestration nationallicence Instrumentalisation nationallicence Instrumentation nationallicence New tool for teachers nationallicence Technology, Knowledge and Learning Springer Netherlands 16/1(2011-04-01), 35-54 2211-1662 16:1<35 2011 16 10758 https://doi.org/10.1007/s10758-011-9176-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10758-011-9176-z text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Erfjord Ingvald University of Agder (UiA), Kristiansand, Norway aut NATIONALLICENCE 773 0- Technology, Knowledge and Learning Springer Netherlands 16/1(2011-04-01), 35-54 2211-1662 16:1<35 2011 16 10758 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer