This document discusses research being conducted as part of the MLEARN project, which is exploring mobile learning practices and teacher training in four European countries. The research aims to inform the development of a teacher training program on using mobile technologies in pedagogically appropriate ways. Initial research included analyzing the contextual backgrounds and training needs of teachers involved in the pilot. The training program will focus on developing teachers' technological, content, and pedagogical knowledge for using mobile devices. Research will continue to gather outcomes from teachers and students using mobile devices in classrooms after receiving training.