How sad. How very sweet of you to be thinking of her at this horrible time. I believe it would be very appropriate for the class to do something for her. It does not have to be a lot of money to be thoughtful.
From experience when my husband died suddenly (2 years ago next week.... :( ) We did an "in lieu of flowers" to go to the TX Scottish Rite Children's hospital because he was a Mason and they worked to raise funds so children could get good care at little to no cost. I received notices from the hospital each time someone donated with their address (not the $ amount) so I could properly send a thank you note. I know this would have meant a lot to my husband.
We still received beautiful flowers which were appreciated. The sad part about the beautiful flowers is that you watch them die.
One of my neighbors had some food catered to my house and our country club brought food for everyone after the services. I mean they brought EVERYTHING.... from plastic cutlery, plates, napkins, condiments, ice, drinks and cups. I still have extra supplies that were left here.
My daughter and I couldn't eat and still can't sleep. I shared food with neighbors and others so nothing would go to waste. I froze what I could as well for later use.
After the services and all is done.. people go on with their lives as normal while the person who is grieving is learning a new normal. There are many times that I feel so alone like people forgot about it. I would say to keep her in mind afterwards, especially.
You are a very nice person to be thinking of her.