The spring school takes place in the mathematics building of the TU Berlin in room MA 004.
See here for more details on how to get there.
Information about Berlin's public transport can be found on the web pages of the BVG here.
Information about the city of Berlin (e.g., city map, museums, cultural events) can be found on Berlin's official web pages here and on the web pages of the Tourist Information here. See also the Magazine  here.