This project should accompany our Erasmus+ KA2 project. Our students, schools and countries have experienced consequences of global warming themselves and students show their great interest in protecting the environment. In short, we want to: 1) accept the CHALLENGE to fight for environmental protection 2) make a CHOICE about what should and can be done/changed by us 3) effect CHANGE 4) be strong and efficient in working TOGETHER transnationally. "CCC-OMF" will be a motivating and valuable tool for our schools to internalise sustainable behaviour in the areas of “environmental and climate goals”, “ICT" and "European awareness".