School authorities, universities, and employers often schedule multiple tests on the same day or week, causing overlapping exam preparation and a dense testing schedule. This multitask learning can be intense, under pressure, and challenge the student's mental and physical perseverance. As a...

"There are large differences across countries in instructional time in schooling institutions. Can these differences explain some of the differences across countries in pupils' achievements in different subjects? While research in recent years provides convincing evidence about the effect of...