When did he turn 7 & what grade is he considered to be in? NY requirements do look pretty formal from looking on the HSLDA's website.
Are you comfortable with taking him out to places like a science museum or is his health still too fragile to be exposed to the germs there? Maybe you could design some math or science lesson plans around the exhibits at the museum and do them while you are there -- visit the exhibit, sit down to eat lunch and review & read the brochures from the museum, & then pull out a pad of paper and pencil to work on math problems related to things in the exhibit.
If you find out info about the exhibits ahead of time, you could for instance do some math problems related to blood flow (stroke volume x heart rate = blood flow) if you had just seen the Body World's exhibit at a science museum. I'm just throwing random ideas out there; this may not be an appropriate math lesson for what your ds is needing to learn right now.
