The present contribution is situated in the framework of a broad government project (entitled Pacte pour un Enseignement d'Excellence) and is specifically devoted to the learning and teaching of modern languages. Our group has been working on the collection, selection, and validation of innovative tools for foreign language learning targeting all levels of proficiency in compulsory education. The present paper reports on a case study that addresses reading strategies outside the classroom for Dutch as a foreign language at A1 level and using a mobile hunt in the Hergé Museum4 (Louvain-la-Neuve, Belgium). The intended outcomes of our case study include (1) the promotion of mobile and classroom Open Educational Practices (OEPs) for L2 reading, (2) the development of in-service teachers' and learners' digital literacy skills (including among others the co-construction of Open Educational Resources (OERs) and reflective practices on image rights), and (3) the creation of Professional Learning Communities (PLCs) and communities of practice. The Actionbound mobile app was used for the mobile hunt. The participants involved in the case study include three researchers, one teacher trainer, 11 pre-service Teachers (psTs) and two classroom groups of Dutch learners (fifth year of primary school). The study setup (including both the teacher training aspects and the activities) is detailed and illustrated, together with the suggestions that emerged from the questionnaires and follow-up focus group discussions. [For the complete volume, "New Case Studies of Openness in and beyond the Language Classroom," see ED596829.]