Approver Comments:
I agree that Ita is the most likely candidate to have signed the album for school #23! In September 1941 she would have been almost 13 years old, the right age to be attending that school at the time. In the future, please leave a comment detailing your process for me and your fellow researchers.
Also note her addresses: Bleigasse 155 #10 and Schneidergasse 18 #5. (The second entry for her lists a change of address on February 5, 1942, to Bleigasse 15, so 155 might have been a typo; there's another date listed in a ghetto note in the first entry--September 11, 1942--without reference to what it might mean.) See you in stage 2!