The 21st century has brought complex environment. In order to excel in this ever-changing world, young people need to be capable of thinking critically to be creative, innovative and adaptable. Critical thinking – the ability to think clearly and rationally – allows properly understand and address issues effectively. Because of that critical thinking became the most prominent 21st century competence. However, this cognitive capability is not developed overnight, it takes time to understand how to think critically. Erasmus+ project “CRItical THinking as 21st century key competence: youth and mass media (CRITH)” is answer to this challenge in the field of youth work with focus on media literacy. VESUVIO NGO staff members in cooperation with trainers from Estonia designed this project with the aim to build capacity of partners’ organisations in prevention youth from manipulating information in the media, to train youth workers to think critically in order to understand the world and own place in it, so they be able to transfer new gained competences to young people – the final beneficiaries, explain them how to analyse media texts, photos and video in mainstream and social media with critical eye. Partners organisations from EU countries expressed their needs in such training with the aim to incorporate media literacy skills into their daily work with young people. After discussions with young people and analyzing local needs, VESUVIO agreed with partners' organisations that it is high interest to bring together organisations which have already experience in media literacy and which do not have with the aims to examine the role and impact of critical thinking and particularly in vulnerable social groups, such as migrants, refugees and national minorities. The objectives of the project are: • to raise awareness about importance of critical thinking as 21st century key competence; • to develop participants’ competencies in planning, implementing and evaluating learning activities about media literacy; • to share good practices of youth work with media and social media; • to contribute to the capacity building of youth organisations; • to develop and reinforce EU networks for partnership in non-formal education; • to promote non-formal education methods with focus on critical thinking in the field of youth work.