Purpose: The paper reports how lesson study helped to make the learning of students with limited English competencies visible in "Content and Language Integrated Learning" (CLIL). Design/methodology/approach: The two lesson study cycles took place in a Swiss primary school with a focus on three case pupils each with heterogeneous…

Purpose: The purpose of this paper is to examine how lesson study can lead to teacher learning and improvement of instruction by developing teachers' mathematical-task knowledge and by supporting teachers' selection, modification, and implementation of mathematical tasks. Mathematical-task knowledge includes knowledge needed to use tasks that…