TreasureBox for Mentors and other support-persons in ESC – a set of 26 concrete working methods and activities that mentors and other support-persons in ESC projects  can use in different phases of the mentoring relationship, depending on their needs and the particular moment in their educational-emotional process. The methods are structured in 4 categories of support: building a positive relationship with the project team, personal, emotional support and wellbeing, problem-solving and support for personal development and the learning process. Besides the methods and tools included in this practical toolbox and guide, users can find a few case studies based on mentors’ real experiences, but also some clarifications regarding the support-role as project partners understand it, alongside information on short-term mentoring processes and some practical advice for mentors. This tool is designed for adults who need to educate and equip themselves with new ways to reach their mentees.