School #15b was a school for boys in Lodz. Most students at School #15b in September 1941 were between 10 and 13 years old, meaning that they were born between 1928 and 1931.
School #15 was located at Ulica Widok 7. The street name was changed to Rungestrasse when German occupation began in 1939. See
www.lodz-ghetto.com for a map of Widok and the rest of the Lodz ghetto.