The D3MOBILE Metrology World League was established in 2013 with the goal of encouraging curiosity about and interest in science (particularly geoscience) with secondary students of the International Standard Classification of Education (ISCED) grades 1 and 2. Presented as an international championship, D3MOBILE introduces students to the discipline of photogrammetry through the e-learning methodology concept. Pupils' use of wellknown technologies, such as their own mobile devices (smartphones or tablets), allows educators to develop attractive and challenging teaching procedures. All work proposed for participants is presented using scientific, technical, and professional language but in a more interactive format than with traditional textbooks or theoretical classes. The challenges, which provide students with the opportunity to establish their own learning objectives, encourage both teamwork and individual responsibility.