School #9b was a school for girls in Lodz. The students in school #9b attended classes in the afternoon. Most students were between 10 and 16 years old, meaning that they were born between 1925 and 1931.
School #9 was located at Ulica Rybna 15. The street name was changed to Fischstrasse when German occupation began in 1939. You can read more about Ulica Rybna at
http://www.lodz-ghetto.com/rybna_street.html,13.