I was recently introduced to Professor Hamesh Sharma by Judy Hornigold and to Chris Woodin  through my own research. I have always been an advocate for the importance of subitising as a foundation for number sense and mathematical thinking. Are Sharma’s visual clustering and Woodin’s icon cards related to subitising, or not! That’s what I… Read More Visual Cluster Cards, Subitising and Icon Cards – Same or Different?