This document discusses how pre-service teacher education programs can prepare teachers for using information and communication technologies (ICT) in the classroom. It uses Popper's framework of three worlds - the physical world, mental world, and world of human ideas - to examine the tensions teachers face and how they can mediate between these worlds. The rapid development of ICT has changed what and how students learn, but many teachers still use traditional teaching methods. The document argues pre-service programs should move beyond teaching ICT skills to focus on constructivist teaching practices and help teachers adapt to continuous changes.