After 25 years with small to moderate gains in performance in mathematics, scores on the National Assessment of Educational Progress (NAEP) main assessment declined between 2013 and 2015 in Grades 4 and 8. Previous research has suggested the decline may be linked to the implementation of the "Common Core" state standards. In this…

In Brazil, the mean of math test scores for students of the fourth grade declined by approximately 0.2 standard deviation in the late 1990s. However, the potential changes in the distribution of scores have never been addressed. It is unclear if the decline was caused by deterioration in student performance levels at the upper and/or lower tails…

The aim is to describe the development of achievement in compulsory school in the Nordic countries from the 1960s. The study relies on published results concerning literacy and numeracy from the international large-scale assessments between 1964 and 2012. Among others, the following conclusions are drawn: (1) for most countries, a small but…

The Third International Mathematics and Science Study (TIMSS) shows U.S. 4th graders scoring above the international average in both math and science, 8th graders slipping in both subjects, and 12th graders scoring at or near the bottom. Research indicates high expectations, a focused curriculum, better-prepared teachers, and balanced instruction…