The webinar/workshop was organised by the Environmental Educational Lab (EEL-NKUA) in collaboration with the primary and secondary environmental education project coordinators in B and C Athens and Eastern Attica Education Districts on 13.04.2022. The NKUA team participated with five presentations entitled: a) "Environmental Education for Sustainability and citizen science. Framework and possibilities for actions under the Cos4Cloud project" (Maria Daskolia), b) "Using the digital tools of the Cos4Cloud citizen observatories" (Dimitris Gkotzos), c) "The Cos4Cloud educational scenarios and their application in school" (Varvara Petridou), d) "Suggestions for pedagogical use of Pl@ntNet" (Vera Vorylla), and e) "Ideas for educational activities for EEfS using the CO tools of Cos4Cloud" (Anna Trigatzi, Matrona Pappa, Zacharenia Daskalaki). The webinar was attended by 35 in-service teachers. Τhe announcement of the event is available  here.