K.H.
Thankfully we have never had that experience. Personally I cannot fathom finding the time to make up that much work. I would look through the pages and see what is concept driven and what is busy work. I'd probably also ask the teacher if everything needs to be completed and in what time frame.
One of my kids would be an emotional wreck when trying to do that much. I think the stress/frustration would have done nothing but make her hate school. The other one might be able to handle it.
good luck!