An Investigation of Activities on Angles in the GeoGebra Library from the Perspective of Dynamic Geometry Task Analysis

Abstract

This study aims to examine the quality of middle school level open access GeoGebra activities related to the learning outcomes of the subject of angles, within the framework of the Dynamic Geometry Task Analysis developed by Trocki and Hollebrands. The research is designed around the document analysis method, one of the qualitative research methods. The sample of the study consists of 61 activities that meet the criteria of being at the middle school level, aligned with the Ministry of National Education (MoNE) learning outcomes, themed on angles, and available in Turkish. Content analysis was utilized for data analysis. The results of the study revealed that the activities prepared for the middle school level learning outcomes on angles are concentrated at levels (1) ' Prompt requires student to recall a math fact, rule, formula, or definition. and (3) Prompt requires student to consider the mathematical concepts, processes, or relationships in the current sketch.' in terms of mathematical depth. These resources contains a limited number of activities at levels 4 and 5, which would allow students to go beyond the existing structure and generalize mathematical concepts, processes, or relationships. In terms of technological action types, the examined dynamic geometry activities are concentrated at level D. This finding leads to the conclusion that sliders and dragging tools are predominantly used in the technological actions of the activities. It is recommended that activities aiming to teach the concept of angles at the middle school level -which is cited as an important teaching and learning resource for teachers and students- should be designed to address potential difficulties in the subject of angles and to enhance conceptual understanding. In this regard, the dimensions of mathematical depth and technological actions should be addressed during the design process of the activities to be presented within the open access GeoGebra resources.