Marie-Sophie Gélinas holds a bachelor's degree in preschool and elementary education. She taught at primary level before becoming a mathematics consultant at the Centre de services scolaires de la Vallée-des-Tisserands, then at the Centre de services scolaires des Grandes-Seigneuries. Having frequently observed in her practice the difficulties elementary school students have in analyzing mathematical problems, she became familiar with the balanced approach to additive structures developed earlier, and then joined the research project to develop activities for multiplicative structures.
