The academic calendar contains national data on how the academic year is structured (beginning of the academic year, term times, holidays and examination periods). Differences between university and nonuniversity study programmes are also highlighted. The information is available for 37 countries. [For the 2021/22 report, see ED617647.]

The academic calendar contains national data on how the academic year is structured (beginning of the academic year, term times, holidays and examination periods). Differences between university and non-university study programmes are also highlighted. The information is available for 37 countries. [For the 2020/21 report, see ED610818.]

This paper investigates the sustainability and the impact of offering the dynamic approach (DA) to schools for more than 1 year in improving student achievement in mathematics (quality) and reducing the impact of socioeconomic status (SES) on achievement (equity). A sample of 56 schools in socially disadvantaged areas in three countries (i.e.,…