Sullivan High school has an ongoing exchange with Altona Gymnasium in Hamburg that is supported by the Hamburg Committee of Chicago Sister Cities International. Nine students and teachers visited Hamburg in October 2017 for two weeks. Ten students from Altona visited their Sullivan counterparts in Chicago. While in Hamburg, Chicago students not only visited various museums and did sightseeing, students from Sullivan’s rock band performed with young musicians from Altona. For many of the Sullivan students this was their first trip abroad and they greatly enjoyed the experience. The plan is to continue the exchange, with the next one in 2018.