From 17 to 19 November 2021, eleven schools of the Extreme Energy Events (EEE) Project met in person at the Ettore Majorana Foundation and Center for Scientific Culture in Erice for the workshop "1st Meeting of the EEE Project after COVID shutdown"; the meeting, organized by CREF and INFN, brought together 50 students and teachers in person and more than 250 participants remotely connected.

The EEE Project is performing an ecological transition, so the heart of the meeting was the Masterclass: “Ecogas for EEE stations - Data analysis on ecological mixtures”. The students of the Project had the opportunity to analyze the data recently acquired by some telescopes of the EEE network, in which the standard gas mixture was replaced by different mixtures with low Global Warming Power (GWP). The students discussed the results of the tests, also presenting their original contribution: the best works were awarded at the end of the workshop.

The agenda (https://agenda.centrofermi.it/event/197/timetable/#20211117) included also three seminars dedicated to coincidences between distant detectors, the PolarquEEEst mission and Physics applied to the archaeological sector, a contribution that prepared the students for the visit to the Lilibeo Museum in Marsala, which took place during the morning of the second day of the meeting.

The great success of this initiative represents a first step towards the restart of the activities of the EEE Project.