The main aim of this study is to develop a useful, valid, and reliable two-tier proportional reasoning skill test for middle school 7th and 8th-grade students. The research was carried out using the sequential explanatory mixed method. The study group of this research comprised of 391 (n[subscript 7th-grade]=223, n[subscript 8th-grade]=168)…

In this cross-national study, we explore the different ways of reasoning-and-proving (RP) presented in three 8th grade textbooks, one from each country: Turkey, Norway, and Slovakia. While the analysis revealed that all three textbooks contain similar numbers of problems involving some form of RP, differences exist in terms of the dominating ways…

The aim of this study was to develop an instrument for assessing sixth-grade students' number sense skills in fractions and decimals. This study was conducted on 452 sixth graders (10-11 years old) from the western region of Turkey. The construct validity of the number sense test (NST) was examined via exploratory factor analysis (EFA) and…

In Turkey, children are accepted to conservatory music departments after fourth grade and fine arts high school music departments after eighth grade by taking a musical talent test. For students with high musical aural skills to know about their potential and be directed to the related education institutions there needs to be a valid test. This…

The Torrance Tests of Creative Thinking Figural Forms A and B are widely used to measure creative potential. Despite their common application in research, there has been a lack of focus on the psychometric properties of the tests. Thus, the scoring of the items is based on some unexamined hypotheses. The items are hypothesized to be equally…

Self concept is an experiential formation gained as a result of certain experiences. The concept of self-concept has an interesting intersection with the psychological field of humour. The aim of the study is to examine the relationship between the humor styles and self-perceptions of primary school 4th grade students and to conduct the…

This study was designed to determine the psychometric properties of the School Readiness Assessment Tool (SRAT), a new measurement tool for assessing school readiness. The measure aims to assess preschool children's school readiness by estimating their academic, motor, social, emotional, and self regulation skills. Both academic and motor skills…

Science process skills are an important part of scientific inquiry that need to be monitored so that pupils can improve their skills to do science. Although there are several science process skills tests mentioned in the literature, we decided to develop an online one in order to improve the usefulness of the test and enable autoscoring to reduce…

The aim of this study is to develop a theoretically sound, valid, and reliable scale to examine seventh and eighth grade students' attitudes towards so-called skill-based mathematics questions (SBMQ). The sample of the study was 820 seventh and eighth grade students at three different middle schools in Etimesgut District of Ankara Province. A…

Although visual creativity in art affects all variables of the learning and teaching process, no measurement tool has been found in the Turkish literature regarding the level of students? visual creativity in art. In this study, a measurement tool was developed to measure visual creativity levels of primary school students in art and evidence…

The aim of this study is to develop a valid and reliable astronomy attitude scale for secondary school students. The method of this research is a scale development study. The study group of the research consists of 300 students studying in 3 different secondary schools in Turkey in the first semester of the 2022-2023 academic year. A 32-item…

The aim of this study is to examine 8th grade students' Van Hiele geometry thinking levels, proof writing and justification skills. The research was carried out with sixteen eighth grade students of a private school in Sivas. Participants were selected based on an easily accessible sample. The data were collected from the students who participated…

This study aims to develop a valid and reliable achievement test to measure the achievement of eighth-grade students in the "Seasons and Climate" unit of the science course. The research was carried out using a survey model. The study group consists of 298 eighth-grade students studying in various cities in Turkey in the 2020-2021…

This study aims to develop a test to measure sixth grade students' success in 'Circulatory System'. For this purpose, a draft test containing 22 questions was prepared by the researchers. And then, the draft test was submitted to expert opinion and examined in terms of language and content. Following expert opinions, the 22 multiple-choice…

The primary goal of advanced mathematics courses is to equip students with proof skills. That is why the competence of pre-service mathematics teachers in proof is considered an assessment of their performance. Despite the emphasis on mathematical proof in undergraduate education, students studying higher mathematics at university often face…