Online Resources for Chemical Safety in Science Education, CheSSE, is a three-year ERASMUS+ project that started September 1st 2020. The University of Oslo (Norway), the University of Helsinki (Finland), the University of Ljubljana (Slovenia), and Stockholm University (Sweden) run the project. The aim of CheSSE is to develop condensed, up-to date, online resources about chemical safety in science education. A desired long-term goal is that teachers feel competent and safe when handling chemicals and managing school laboratories. The material will be developed through discussions and workshops, and published on this website, chesse.org. in the participating organizations’ languages and in English.