DISCLAIMER: The present Project Deliverable has been submitted to the European Commission for review. The information and views set out in this report are those of the author(s) and do not necessarily reflect the official opinion of the European Union. Neither the European Union institutions and bodies nor any person acting on their behalf may be held responsible for the use which may be made of the information contained therein. _____ The R&I Action #2 “Youth Employment” of the Horizon 2020 project CoAct (Co-designing Citizen Social Science for Collective Action) is a Citizen Social Science project with young Early School Leavers (ESL) aged mainly between 15 and 18 years, who take part in educational measures to fulfil their legal obligation of remaining in education or training until the age of 18 (“Education and Training up to 18”). By employing a participatory research approach, R&I Action #2 aims to develop new and adapt existing measures organised under the “Education and Training Act” through the insights gained by doing collaborative research with young people affected by these measures. To communicate and implement research results, a Knowledge Coalition is organised concurrent to the research, with the aim to bring together young people and their ideas with those responsible for developing educational measures for ESL and NEET (Not in Education, Employment, or Training) youth. The present document constitutes Deliverable 4.1 “Report on Knowledge Coalition Building” (Work Package 4) and describes how the Knowledge Coalition was constituted as a platform of different stakeholders to stimulate knowledge sharing and eventually discuss the data and results of the research project conducted with young people. The Knowledge Coalition is an integral part of the R&I Action #2, combining a diverse range of representatives from the federal and regional level as well as social workers, people from the grassroots level and youth organisations. The members of the Knowledge Coalition assist the research project with their expertise on how “Education and Training up to 18” is implemented in practice and provide the researchers with insights on the recent developments and challenges in this area. In the course of the research, the members become addressees for research results and are invited to directly discuss possible developments of new measures or adaptations of existing ones based on the needs and insights of young Early School Leavers. This report covers how “Education and Training up to 18” is organised in Austria and lays out who is taking part in the Knowledge Coalition. Furthermore, it describes the content of the first round of knowledge sharing which was accomplished through conversations and focused on the experiences of day-to-day practices within the diverse institutions and organisations connected to “Education and Training up to 18”. As it happened, Covid-19 was a decisive factor in the recent challenges and will be addressed accordingly. The key outcomes and concluding reflections give an idea of the challenges encountered during this phase of the research project and give an outline of the next steps taken in the near future.