"The ALL Erasmus+ Strategic Partnership aimed at deepening the knowledge on marine environment and ecosystem, with a focus on the Adriatic basin and generally on the Mediterranean Sea, by studying its habitats and environmental characteristics, as well as the impacts and threats of anthropic activities. The project also raised participants' awareness of the tight connections linking the various ecosystem’s components and showed how human activity is increasingly affecting the marine dynamics. The project originated from the Erasmus+ Strategic Partnership NECST (2014-2017), led by the same coordination unit (including FEEM, CivicaMente, and Eni as an associated partner). In addition to the partners involved in the coordination unit, the project involved two highly-qualified scientific partners with educational experience (Fondazione Cetacea and Blue World Institute) and four upper secondary schools from three countries representing different shores of the Mediterranean basin: Gela and Ravenna (Italy), Zagreb (Croatia), and Limassol (Cyprus). In particular, the project involved 190 students from the four partner schools and their teachers (14 in total), who worked together in national and transnational groups to maximize the impacts of the cultural exchange envisaged by the project.Project activities have been carried out according to the most modern and participatory ICT-educational methodologies, such as Open Mind and Citizen Science. In fact, the aim has been to develop and experiment with an innovative learning approach using digital technologies. In fact, the project created an effective immersive learning environment, facilitated classroom discussion, stimulated shared reflection, and promoted the acquisition of new skills through activities mediated by digital technology. Also, Citizen Science approach was used to conduct dynamic field research with digital tools connected through the Platform and the smartphone App; it allowed schools to be actively involved in the project. Finally, the multimedia Platform created a learning environment where participants progressively discovered the project digital contents with the support of virtual areas to which students directly contributed to their work.The project produced several Intellectual Outputs, including 1) multimedia scientific contents and webinars on marine biodiversity; 2) the Platform and the smartphone App, connected through QR codes during a treasure hunt in the cities where the schools are located (Blue Hunt); 3) 40 e-books made by students, divided into transnational groups, on assigned research topics; 4) a digital journalism newsletter on the project activities.The main impact of the ALL project consists in the replicability of its methodology in other schools at the national and European level, as well as in other scientific fields. This entails that the ALL methodology is an effective modern learning experience and a ""best practice"" that may be complementary to traditional learning approaches. In the long term, this impact will result in a greater awareness of all direct and indirect participants, as well as in a widespread awareness of environmental issues concerning the marine ecosystem, its environmental peculiarities, and changes caused by anthropic activities."