The Excellence Center in Halle is an great affordable volunteering opportunity for anyone interested in travelling and gaining teaching experience. Located in the center of the city, the EC allows volunteers to explore the East German city of Halle. English is spoken around the center, but there are many chances to learn and practice German.
The EC has great connections to the Arabic community in Halle. The city is about 250,000 people, but has a large Syrian community (probably around 5% of the city), after many refugees fled due to the war. Many Syrians need both English and German language skills in order to open up job prospects and integrate into Germany, and the Center helps them a lot in this regard.
Personally, I started volunteering in the EC as a resident of Halle in order to gain experience as a Language Teacher, which helped me in finding further work in other language schools and gain confidence as a teacher. However, I remain connected with the Center because of the great atmosphere at the place and because I was able to get paid work through the Center after I finished.