Teachers do not directly implement new teaching materials, but rather adapt them. For changing teaching practice, research requires more insights into these adaptions. This study draws on the Theory of Instrumental Genesis to describe the ways teachers adopt the percentage bar model to create different learning opportunities. The results of the…

The English language plays a major role around the world, making it important to learn English in order to participate and communicate in our globalized age. Adequate foreign language (L2) skills are important for everyday life and can even enhance performance in one's first language (L1). A growing number of very heterogeneous classrooms make it…

In a globalized world, the ability to speak English has become increasingly significant. A large number of students who are learning English as foreign language face obstacles in acquiring and storing vocabulary. Children with learning disabilities are especially at risk because of a limited power of retention and motivational struggles. Having an…

This document contains the second volume of the proceedings of the 30th Annual Conference of the International Group for the Psychology of Mathematics Education. Conference presentations are centered around the theme "Mathematics at the Centre." This volume features 60 research reports by presenters with last names beginning between Abr…