I did two more days teaching, and it was a lot of fun.  The students now recognize me and like to chat.   It felt really special when the principal said I was invited to the graduation because I was "part of the family now".  That was really special.
The senior class is trying to do a prom, but most have no money, and some live in shelters, so I suggested that they start a go-fund-me page.  
There is such a large LGBTQ community in NYC, I know that they could raise the funds.