On Monday 11 November 2022, the Vocational Training Institute for Work and Technology (biat) held a webinar on the Erasmus + project CityGo. Various participants from different institutions were informed about the project. Prof. Dr. Axel Grimm presented the learning approach in the context of online communities. Maik Jepsen presented research results from the survey of students and teachers regarding online learning. The guests were given an insight into the guidelines developed for the design of online learning communities and discussed them. In addition, Nele Tutznik presented the upcoming activities within the project. Flensburg European University will offer a study module on resource-efficient 3D printing in the spring semester 2023. Communication will take place via the Discord platform.