Like many other European cities, Prague, the capital of Czechia,is facing air quality problems. Senzorvzduchu, z.s. (“Air Sensor”) is an NGO which promotes community building through air quality measurements using the Sensor.Community DIY sensor kit solution. The CitiMeasure pilot focused on a project called Sensor2School, the aim of which was to build 50 sensors in schools together with students, discussing the possibility of citizen measurements and the importance of air quality. Students develop their sensors, start measuring in their schools, and use an information board with a QR code to see the results shared via a web platform. This pilot aimed to test the application of the CitiMeasure Guidelines on Competencies for Digital Inclusion to assess the competencies required for, and acquired by, participation in the Sensor2School initiative. To do so, pre- and post-project surveys were designed that helped the project team understand the competencies needed for participation. It also revealed acquired knowledge and changes in students’ perception of air quality. 83 Understanding the competencies of students measuring air quality in Prague