Understanding and taking care of our environment is a topic that appears across the curriculum in European schools. It is a close-to-the-heart subject, which attracts students’ attention and leads to rich, enjoyable educational activities while building positive attitudes as citizens of the future. It is also a topic that can provide deep intellectual stimulation and satisfaction through drawing upon a wealth of data to analyse and discuss at a scientific level. Children from the earliest age can be fascinated by observing small changes that occur in living organisms throughout the seasons. This is the science of phenology, the study of periodic plant and animal life cycle events, and how these are influenced by seasonal and inter-annual variations in climate. Although not always named as such, phenology is highly pertinent to curricular subjects such as science, mathematics and geography in both primary and secondary education. Collection of phenological information is a long-established Citizen Science activity across Europe, with national and international associations gathering individual data sets provided by thousands of people each year. However, it is still a science that for the most part continues to use pen and paper to collect data. Our project, PhenoloGIT, has designed, built and tested a collaboratively created educational environmental information platform, supported by state-of-the-art mobile technology and Geographical Information Technologies (GIT), to be used by teachers and students in primary and secondary schools. The platform allows them not only to make scientific observations in their local environment and gather new data in an intuitive and engaging way, but also to acquire complex knowledge by sharing new information using open-source tailored educational tools to analyse and reflect on graphical, spatial and mathematical data sets. These tools and resources have been released as open source/free license resources, to promote their use and evolution in the years following the project and so offer great potential benefits in the longer term for schools across Europe. Using everyday mobile devices (phones and tablets with GPS), accessible and open source tools, together with attractive learning materials and study guides linked to STEM curricula, European students and teachers piloted the tools and created an educational network where reflection on data from local environments has led to a range of engaging learning experiences. Teachers and students were given free tools in the form of a mobile App and Map Server running several layers of GIT information. Guidance in the use of these tools was provided, not only to learn and share information about environmental facts, but also to create materials and reflect on knowledge gained. The project was designed and implemented by academics, teachers and technologists to ensure that any teacher with basic ICT skills could be part of the Virtual Learning Environment or ICT platform for schools. The PhenoloGIT project had three main phases. Firstly, four primary and secondary schools from each of the four partner countries were recruited as participants in the project. The schools’ needs and possibilities in terms of phenology, mobile technology and GIT were analysed. Additionally, best educational practices in learning-teaching, tools and strategies were identified. In the second stage these tools were tested in real situations in the participant schools, and training given to a group of pilot teachers. During this stage the teachers provided feedback on the development of the technical solutions, devised learning activities using the PhenoloGIT tools and collected phenological data with their students. The final stage of the project was devoted to the design and implementation of a social learning network of GIT based school projects, not limited to phenology, but including other subjects identified by teachers in the first phase. The main beneficiaries of the project’s products are primary and secondary school educational communities. The project is expected to have a fundamental and lasting impact on science teaching across Europe, increasing relevance and motivation in science classrooms through the use of new technology, with major potential for enhancing student understanding, reflection and collaboration. The project has also influenced students’ (and teachers’) attitudes to and awareness of major issues such as global climate change, nature observation and knowledge and respect for the environment. The GIT Open School Learning Network is a major result of the project, providing a lasting resource for learning how to apply innovative GIT and mobile technologies in an exciting and accessible way for European schools. It will be hosted on a server at Galicia Supercomputing Centre, a respected resource centres for researchers in computational sciences in Spain for five years following the conclusion of the project.