It is moreover possible that schools share the same kit across classes, so that the above figure constitutes a lower bound for exposure: some schools purchased “mobile kits” (mobile IWB and laptop), or share classrooms between different classes. Although traditionally, each classroom is used by a single class group, and pupils stay with the same class group throughout the day and school year, schools are free to adopt a different organisation of their space. Of all IWBs purchased with funds from the “Piano LIM”, 10.6% are mobile kits, and 29.1% are located in dedicated labs (science, music or arts labs; multimedia rooms; etc.).