M.S.
I know you didn't ask this, but from experience, I wanted to suggest that you organize (if you feel comfortable) having moms in the class or the whole school bring meals once, twice a week, etc. You can do this at takethemameal.com. When tragedy strikes cooking and grocery shopping are the last things you want to do. It has been a lifesaver for me!
You are a good friend for wanting to help.