School #11 provided classes for girls; #11B met in the afternoon. Most students at School #11B in September 1941 were between 10 and 13 years old, meaning that they were born between 1928 and 1931.
School #11 was located at Ulica Franciszkańska 29. The street name was changed to Franzstrasse when German occupation began in 1939. You can read more about and see pictures of Franciszkańska at
http://www.lodz-ghetto.com/franciszkanska_street.html,25.