The School with Class Foundation is an expert, non-profit organization, based in Warsaw (Poland). It was founded in October 2015 as a spin-off of the biggest and one of the most successful educational programs in Poland run since 2002. Our programs help young people to become active and conscious citizens and support the development of XXI century skills We help schools to become open and friendly environments engaged in solving social problems, enhancing diversity, with relations based on mutual trust and respect. We support teachers and headmasters in their professional development and in developing student’s critical thinking and problem solving skills. We enhance team work, collaboration, social engagement, student’s responsibility in their own learning and their belief in their own capacities. School with Class has already collaborated with over 9000 schools, 120 000 teachers and a million students. Each year we work with a vast network of schools (over 500 a year) both around Poland and abroad. We gathered knowledge, competencies, resources and staff enabling us to work with students with a deep insight of the needs of young people in their everyday school and outside-school environment. We keep up to date with innovative methods: among others flipped lesson, peer-teaching, inquiry based learning, design thinking – and introduce them to Polish schools to support students innovation and independence. We developed a strong team of trainers qualified to work both with young people and their teachers. All our materials are published on a Creative Commons license CC-BY-SA 4.0. The purpose of the School with Class Foundation is to: support education tailored to the modern world, schools that are engaged in tackling social problems foster the development of 21st century skills in schools improve the quality of teacher training and professional development increase the prestige of the teaching profession equalize educational opportunities of children and youth