To help learners acquire and develop the necessary skills for the 21st century, Algeria has adopted the Competency-Based Approach (CBA) along with the Project-based Learning (PBL) approach within its educational system. Theoretically speaking, the goal behind such reform is to shift from a content-based to a process-based learning/teaching and…

While professional development has been emphasised in many countries, few comparative studies have examined the degree of teachers' participation in professional development and its effect on teachers. Using the TIMSS 2007 data, this study analyses to what extent teachers participated in professional development in 50 TIMSS countries and examines…