What is a recurring feature of the IEA's assessments?

The recurring feature of the IEA's assessments is that they conduct longitudinal studies, which allow for the tracking of educational trends over time. Longitudinal studies involve repeated observations or measurements of the same variables over extended periods. This approach provides valuable insights into educational progress, policy impacts, and changes in educational systems across different countries or regions.

By utilizing this methodology, the IEA can gather data that reflects not only the current state of education but also how it evolves, enabling researchers and policymakers to make informed decisions based on trends and patterns. The capacity to track these trends over time is crucial for understanding the effectiveness of educational reforms and interventions, as well as for identifying best practices that can be shared globally. This evidence-driven approach helps to create a more comprehensive understanding of global education.