Descriptive analysis of graduate theses in the learning area of numbers and operations between 2005-2023

The aim of this study is to examine the postgraduate studies conducted in the field of Numbers and Operations between the years 2005-2023 according to various categories and to present a general framework for the studies to be conducted later. Qualitative research method was used in the research and document analysis was preferred as the research design. Within the scope of the research, 70 studies, including 68 master's and 2 doctoral theses, were examined. Data were collected by scanning relevant keywords from the YÖK National Thesis Center. The "Classification Form for Postgraduate Theses Published in the Field of Numbers and Operations Learning" was used in the analysis of the data. The studies were analyzed according to 10 different categories in this form, including year, thesis level, numbers and operations sub-learning area, sample size, sample type, research model, research design, data collection tool, the feature it measured and the goal of the study. As a result of the analysis of the data, it was determined that the most studies in the field of Numbers and Operations were conducted in 2019, the sample size was mostly between 31-100 in the studies, and the samples in the studies mostly consisted of 6th and 7th grades. It was observed that in postgraduate theses in the field of Numbers and Operations learning, studies were mostly conducted in the sub-learning area of ratio-proportion, integers and fractions, experimental-quasi-experimental design was used the most among the research methods, and achievement, attitude and anxiety scales were most commonly used among the data collection tools. It was concluded that the most measured feature was student achievement.