Teaching Behaviors in Dynamic Geometry Environment: An Investigation of Nine Chinese Mathematics Lessons in The Prospective of Instrumental Orchestration

Abstract This paper focuses on how Chinese mathematics teachers integrate dynamic geometry software in lessons. Instrumental Orchestration (IO) lens and its categorization are used to analyze 9 Chinese mathematics lessons. As a result, it shows that most orchestration types can be identified in this study with some different characteristics observed. And a more classic way is identified for Chinese teachers to use DGS which indicates DGS is assimilated into the current teaching process. Teachers more use dragging mode to show the initial and final state of the figures. We also re-organize IO types and divided explain-the-screen into T-explain-the-screen and S-explain-the-screen based on who can be the explainer. This indicates that these teachers try to change their teaching process from lecturing to facilitating student’s learning.