A search for Ch* Lam turned up three results, of which Chana was the only one to have been born in the correct time frame for attending School #19A.
I found Chana's family based on matching addresses--some matched both addresses, while others only matched one. Chana's father (Mojzesz, b. 1888), mother (Fajga, b. 1888), and some of her siblings/cousins (Nacha, b. 1918; Ester, b. 1924; Schajek, b. 1925) all lived with Chana at both addresses. Her other siblings/cousins (Krazel, b. 1910; Mordka, b. 1910; Icek, b. 1933) lived at the same Inselstrasse address but then moved to an address at Buschlinie 107.
I was not sure if all the youth I found were Chana's siblings. Fajga would have been 21 or 22 when Krazel and Mordka were born, which is plausible, but Krazel and Mordka were born 3 months apart in the same year, which either means that the birthdates in the database are wrong or that Krazel and Mordka were more likely cousins than siblings.
Chana's profile has her transport number as 2/2, but no deportation date. With the exception of Mojzesz (who died on Jan. 19, 1942), all of the other members of the family were also deported on transport 2/2. Some have a date next to their transport number--February 23, 1942. According to Secondary Sources, there was a deportation to Chelmno on this date, so it is possible that Chana was on this transport.