School #20 was a school for boys in Lodz. The students in #20b attended classes in the afternoon. Most students were between 9 and 15 years old, meaning that they were born between 1926 and 1932.
School #20 was located at Ulica Jakuba 10. The street name was changed to Rembrandtstrasse when German occupation began in 1939. You can read more about Ulica Jakuba at http://www.lodz-ghetto.com/sw_jakuba_street.html,24.
When I was searching in stage two I found Mordka listed with the surname BEITELCWEIG. I found his father as Majlich born 16/04/1895 his mother as Zelda born 97/02/1896 and his brother as Arie Lajb born 18/09/1936 and deported on 15 Oct 1942. There were also Szmul born 07/02/1892 and died 24/07/1942 and Golde born 25 Dec 1896 and died 20/01/1942 living at Hamburgerstrasse 57 flat 9. I believe Majlich and Zelda are the better match for parents since they appear in the database with both surname spellings as well as the same addresses. But I entered in both possibilities to be sure. I wasn't able to find anymore information on Mordka or his family in the following stages.
