School #15a was a school for boys in Lodz. Most students at School #15a in September 1941 were between 6 and 11 years old, meaning that they were born between 1930 and 1935.
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.