People Prof. dr. Marcus Specht Job title Director Leiden-Delft-Erasmus Centre for Education and Learning Prof. dr. Wilfried Admiraal Job title Full professor Technology-Enhanced Teaching and Learning Prof. dr. ir. Geert-Jan Houben Job title Professor of Web Information Systems, TU Delft Prof. dr. Fred Paas Job title Professsor of Educational Psychology, Erasmus University Rotterdam Dr. Esther Tan Job title Senior Researcher Dr. Jacqueline Wong Job title LDE CEL Researcher