Christian Sailer is a research assistant at the Geoinformation Engineering group, ETH Zurich. He received his Master of Science in Geography from the University of Zurich, Switzerland, in 2008. He is working since 2006 at Esri Switzerland and was in charge of customers from Education and Environment. In his current research at ETH, he develops a platform for location-based mobile learning to research the use in higher education as well as in secondary school. He is specifically interested in both, teaching and technologies that can teachers as well as learners help to improve the interaction with mobile learning services.