Christian researches online education and learning potentials of digital technologies. He focuses on areas where digital technologies can expand the possibilities for both teaching and learning activities. He primarily deals with student perspectives through studies on how digital tools can be used to strengthen student agency.

Christian also researches the new academic (digital) literacies that technologies bring with them, and he explores how we can understand digital literacy as elements of existing (expanded) literacy.

Christian teaches on the Master's program in IT-based educational design, which is a partially online education that trains IT-educational designers. The program itself is structured as an IT-educational design, which investigates and experiments with digital technologies within education.