Project ConCitizen addresses a key issue in citizenship education: how do we teach controversial issues particularly related to contested narratives in post-conflict and diverse societies? European education systems share a strong tradition of democratic formation, focusing on coexistence, critical stance and respect for diverse opinions and outlooks. However, new challenges for democracy have emerged such as populism, right-wing and Islamist extremism. In addition, the digitalization of society has evoked a polarized debate culture on social media characterized by echo chambers and filter bubbles. ConCitizen explores how contested narratives and controversial issues are included - or avoided - in the school subjects of history, religious education, and citizenship education. ConCitizen seeks to stipulate innovative learning and teaching practices by developing pedagogical models that encourage self-reflection, awareness of power relations, and critical thinking when teaching contested narratives. The aim is to strengthen the student teachers' ability to create an inclusive learning environment by addressing stereotypes and highlighting common vulnerabilities. To promote digital readiness in education, ConCitizen will develop digital teaching materials and a virtual exchange format with student teachers as co-creators. An innovative element of the project is to explore the use of eTwinning as a platform for cooperation in higher education. In addition, ConCitizen addresses an international gap in teaching materials that combine a presentation of key concepts and theories with pedagogical models.