Prof. Law Huk Yuen serves as an Assistant Professor in the Department of Curriculum and Instruction at CUHK, where he leads the mathematics education team and also holds the positions of the programme director of the Master of Science in Mathematics Education and the programme coordinator of the B.Ed. of Mathematics and Mathematics Education. He has been actively involved in researching practitioners’ action in their workplace under Hong Kong’s curriculum reform with particular reference to the lesson and learning studies in the field of mathematics education.