Gender: boy
School:
School #20A
I believe this is Josef, I'm thinking maybe they got Josef instead of Josek due to translation differences, or maybe the student wrote it incorrectly. Either way, the birthday would make sense for this child to be Josef.
I found Josek's mother and sister because they had the same address as he did. Also, they shared the same deportation date and number as Josek.
Using the secondary sources, I was able to determine that Josek, his mother, and his sister were sent to Chelmno. All deportations in March of 1942 were sent to Chelmno, and unfortunately were sent straight to the gas vans. It therefore safe to say that Josek and his family members perished in Chelmno in March of 1942.