Investigation of instrumental genesis of dragging and measuring artefacts used by the 7th grade students in the dynamic geometry environment

The aim of this study is determining the instrumented action schemes created by the students by means of observing the instrumental genesis processes of dragging and measuring artefacts runned in dynamic geometry environment through using of tablets by 7th Grade students in the framework of instrumental approach. Accordingly, the model of study is specified as teaching experiment. The study was carried out with nine 7th Grade students selected by sampling method in 2014-2015 Education year at a medium level sosyo-economical secondary school in the centre of Eskişehir. Eight activities were designed oriented to using of dragging and measuring artefacts in the dynamic geometry environment on the base of 7th Grade learning field attainments for the purpose of practicing on Cabri-Geometry application which is available in TI-Nspire CAS software downloaded to the tablets. The survey data was collected by way of the individual interviews made before and after the application, the video recordings of activity applications and observation notes of the researcher. The data was analyzed by the content analysis method. In consequence of the study, it was observed that the schemes developed by students during the application differentiated and it was determined that every student followed different instrumental genesis processes. According to the revealed instrumented action schemes, four different typology for students' attitude were determined. Keywords: Instrumental approach, Dragging, Measuring, Dynamic geometry software,7th Grade students.