In terms of how much work can you expect, you can probably find the state standards online and consider them a guide. Since this is a gifted site, most kids will probably already have exceeded the standards, in which case you can look at a grade or two or three up and see if the standards give you an idea of what you want to do. Just as an example, a middle schooler might be expected to write a research paper including X, Y, and Z. If she can already do that, look at the high school standards to provide more of a challenge. That's what I would do at any rate.
