  Mobile Learning Games (MLGs) show great potential for increasing engagement,
creativity and authentic learning. Yet, despite their great potential for
education, the use of MLGs by teachers, remains limited. This is partly due to
the fact that MLGs are often designed to match a specific learning context, and
thus cannot be reusable for other contexts. Therefore, researchers have
recently designed various types of MLG authoring tools. However, these
authoring tools are not always adapted to non-computer-scientists or
non-game-designers. Hence, we propose in this paper to focus on five existing
MLG authoring tools, in order to assess their features and usability with the
help of five teachers, who are used to organizing educational field trips. In
the second part of this paper, we present an approach for designing a MLG
authoring tool, based on the lacks identified through the analysis, and
tailored to the teachers' different profiles and needs.
