The stability of educational test results from the Programme for International Student Assessment (PISA) over 15 years was examined, and the influence of demographics and social capital was assessed, as was the impact of educational reforms. The test results were remarkably stable, with correlations up to 0.99 for country-level results over 2…

Mathematics and Science classes in schools have become a focus to be considered in terms of educational systems and administration around the world in the last decade. Related to the mentioned classes, there are many benefits that lead students to academic success. In the recent years, educators have found that there are so many different factors…