Isaac Sayol
Co-founder and Chief Product Officer of Innovamat
Co-founder and Chief Product Officer (CPO) of Innovamat, where he leads product and technology. A civil engineer by training, he founded the company with his university classmates Àlex Espinet and Andreu Dotti and with mathematics education experts Laura Morera and Cecilia Calvo.
workingpaper Education
Explaining the learning decline in PISA 2025 by socioeconomic quartiles through methodological changes
Lucía Cobreros Vicente, Marc Colomer, Eudald Correig-Fraga, Lucas Gortazar, Isaac Sayol
23 Sep, 2026
Working paper in collaboration with Innovamat Research Lab PISA 2025 Volume I (OECD 2026a) reports that the socioeconomic gap narrowed between 2022 and 2025 because advantaged students declined most — “a new phenomenon of affluent students who struggle academically”. However, this pattern is explained by the changes in how the index of economic, social and […]