Besides my research on Operator Theory and Functional Analysis, I author many online educational resources (OER) in particular more than two hundred assessment exercises with random parameters for Linear Algebra, Vector Calculus and Random Matrices, and several demonstrations at Wolfram Demonstrations Project. Team member of, and contributor author to, T.I.M.E.S. European project MathCom Complements in Mathematics for Master Students (2010-2012), scientific advisor at IEEE-IST Academic (2011-2016), Portuguese Coordinator of the Erasmus+ projects FostWom (2019-2022) and MathICs (2021-2024). From 2016, I'm the MOOC Técnico (mooc.tecnico.ulisboa.pt) coordinator and the author and co-author of three online courses: Markov Matrices (2016), Eigenvalues (2017) and ML, Maths & Ethics (2021) with several editions.