A search for Chana Elkan turned up four results (3 of which were born in 1885, and I presume they are the same person), and the last result was a girl born in 1932, which would have made her the right age to attend School #9A.
There was a note on Chana's addresses that said A.M., but her profile on JewishGen.org's site listed the same Hohens address but with 'AltMarkt' instead of A.M.
Chana had family members that lived at the same address as her, including a mother (Fajga, b. 1908), father (Zysman, b. 1906), and a brother (Izrael, b. 1936).
No deportation information is listed for Fajga, but Chana and Izrael were both deported on September 20, 1942. However, there is no deportation associated with that date, so their fate remains unknown for now. Zysman died of currently unknown causes on March 15, 1944.