Abstract
The aim of the study is to develop a scale to determine the performances of middle school students in mathematical problem types. When the literature is examined, the stages common lyincited in most of the scale development studies; item pooling, expert opinion, trial application and validity-reliability stages. In this study, the stages expressed by Turgut Baykul (2015), in which the stages specified, are also used. The “Mathematical Problem Types Test” aims to identify the types of problems that students can solve or have difficulty in solving from the types of mathematical problems mentioned in the literature. The test consists of a total of 30 multiple choice items, which also comprise 8 types of mathematical problems determined from the literature, which also constitute its sub-dimensions. The types of problems identified as well as the sub-dimensions of the test are "separation", "merge", "multiplication", "comparison", "split division", "remainder division", "multi-step", "non-routine" problems. As a result, the "Mathematical Problem Types Test" has been revealed to be valid and reliable.