A systematic review of experimental researches on the learning fields of numbers and operations in middle schools: The case of Turkey

Abstract

Numbers and operations in the mathematics curriculum are very important regarding the number of learning acievements and course hours. In this review, experimental studies related to the sub-learning fields of the number and operations were reviewed according to methodological characteristics and Turkey's demographic features. For that purpose, 90 theses and 23 articles published between the years 2006-2021 were reviewed through a systematic literature review method. In the study, all sub-learning fields of the number and operations learning field occupying an important place in the secondary school mathematics curriculum, were reviewed. In addition, different aspects of the most and least studied learning fields were investigated.The results revealed that "Fractions" was the most investigated sub-learning field both in theses and articles, and regarding dependent variables, academic achievement and attitude towards mathematics were the most studied variables. Asa consequence, it was recommended that the researchers should focus on less-studied subjects of the 8th-grade curriculum and fill the areas deemed incomplete.