The Partnership Building Activity(PBA) aimed to create a common framework to foster the quality and impact of the volunteering projects within the European Solidarity Corps. For this purpose, this activity allowed the participants from Portugal, Romania, Spain, Italy, Poland, France and Greece to work together to reach the following goals: 1. Create a solid network for developing future European Solidarity Corps (ESC) projects among the different organizations; 2. Focus on quality development and the impact of the learning on the volunteers, their sending and hosting organizations and the community (both host and sending); 3. Exchange existing tools that support volunteers' management; 4. Explore and exchange perspectives, approaches, and tools on how to follow up with volunteers within the ESC projects in order to maximize the learning impacts of this experience on different levels; 5. Enable the less experienced organizations of the consortium to learn from more experienced organizations; 6. Improve the impact of future and ongoing ESC projects at three different dimensions: individual level, organizational level and community level.