## Contents

**Beliefs of Pre-Service Mathematics Teachers in China About Mathematical Problem Solving – Focusing on Open / Close-Ended Problems**by*Yixuan LIU and Yiming CAO*(pp. 179-191)**Subjective Visual Imageries in Probability: A Study on Students’ Perspectives**by*Dennis Lee Jarvis B. YBANEZ and Catherine P. VISTRO-YU*(pp. 192-200)**Putnam Grasshopper Problem: Collaborative Problem Solving, Generalisations, and Computational Thinking**by*HO Weng Kin, TAY Eng Guan, TOH Pee Choon and TONG Cherng Luen*(pp. 201-218)**Progressing Mathematics Education Through International Handbooks + A Personal Reflection**by*M.A. (Ken) Clements*(pp. 219-222)**Acknowledgements**(p. 223)