Re: Public School 25 Brooklyn photos from ca. 1913 #photographs
Perhaps try The Brooklyn Historical Society. If they don't have files of such photos they might know other options on where to find them.
According to their site, they remain closed due to Covid. I do not know if they are answering e-mails.
Also, you might try The NYC Municipal Library:
They are also closed due to Covid. There is an e-mail address on the above site.