Gender: unknown
School:
School #5
I did a search for H* Sztajnberg, and Hendla was the only one who came up whose birthdate made her the right age to attend School #5.
I searched the database to find people with the same last name who lived at the same address. I found Hendla's likely father, Abram (b. 1889), and likely sisters Sara Perla (b. 1920) and Chaja (b. 1940).
Except Chaja (no information is listed about her fate), the other family members all have the same date listed for tranfer (or deportation), May 5, 1942. According to Secondary Sources, there was a deportation to Chelmno on this date.