Students' out-of-school learning environment is one of the most prominent factors affecting their school success, which is mostly a source of inequity unfavoring disadvantaged groups. In some countries including Turkey, bilingual students are among disadvantaged groups because most of them are from immigrant families with low socioeconomic status.…

This study examines the factors affecting the mathematics achievement of 8th-grade students in Türkiye using data from the TIMSS in 2011, 2015, and 2019. The data were analysed with multilevel (two-level) modelling. The first level was the student, and the second level was the school. At the student level, such affective characteristics as…

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…

Socioeconomic status (SES) is a key covariate in analyses by the Programme for International Student Assessment (PISA). In its technical documentation, PISA offers evidence for the Economic, Social, and Cultural Status instrument (ESCS) as a valid measure of SES. This dissertation, however, offers both conceptual and empirical arguments that ESCS…

Student success has multiple meanings; however, the quantitative bias prevalent in the northwest American and Western Canadian postsecondary education sector restricts how student success is defined and measured. Standardised measures of student success assume that the student experience is homogeneous and risk the implementation of policies and…

My dissertation examines three current challenges of international large-scale assessments (ILSAs) associated with the transition from linear testing to an adaptive testing design. ILSAs are important for making comparisons among populations and informing countries about the quality of their educational systems. ILSA's results inform policymakers…

Beginning with the 2020-21 school year, the Massachusetts Department of Elementary and Secondary Education began collecting literacy screening assessment data from schools and districts participating in certain state grants in order to analyze patterns of performance to inform improvement efforts. These assessments, which were selected from a list…

Thermodynamics is one of the most complex topics in chemistry. Cognitive Load Theory claims that the complexity of a subject is mainly due to element interactivity - how many elements an individual must organise simultaneously in her/his working memory to master a topic. The simultaneous processing of various chemistry and mathematics concepts to…

The Programme for International Student Assessment has become an important policy tool that has affected educational practices in many countries. Despite some remarkable results in PISA's global ranking tables from China's Eastern provinces, China's distinctive policy response has not been well documented or understood. We systematically examine…

A growing literature has documented the importance of school socio-economic status (SES) composition to children's academic performance, but the channels through which school SES affects individual achievement remain poorly understood. We investigate differences in 15-year-old children's reading performance across schools with different levels of…

Although education is arguably one of the most central institutions in contemporary European societies, only recently scholars have started to study opinions that relate to the perceived legitimacy of education among the public at large. This paper contributes to this emerging literature. Based on data from the most recent wave of the European…

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…

Students with Attention-Deficit/Hyperactivity Disorder (ADHD) are struggling writers. Yet no comprehensive model has been validated to explain their poor writing outcomes. This study aims to test whether an extended version of the Not-So-Simple View of Writing (NSVW) model can describe the effects of key abilities on writing performance in…

States vary widely in their approaches to charter school regulation. We administered online surveys to charter school leaders in four of the most stringently regulated states and three of the least stringently regulated states to examine how their approach might influence perceived school goals and levels of goal agreement. Generally, survey…

Background: Integration of digital tools and resources in STEM instruction has garnered significant attention due to its high potential. Digital professional development is identified as a pivotal factor for equipping teachers with necessary digital skills to effectively orchestrate digital resources. Notably, the role of professional learning…