The first think that popped into my mind when it comes to Dave Barry, Erma Bombeck and Mary Roach is a profile piece. Or you could always use them a starting point. What about an article based around the day in the life of a syndicated columnist? My brain isn't working that great but you could try doing some brain storming using one of them a starting point.
It might be hard to sell and article recounting her battle against epilepsy from her viewpoint though I could be wrong. The first thing that popped into my head though was doing an informational piece about epilepsy with quotes from your daughter relaying her experience. You could always do an interview with you daughter and form an article based off that interview, maybe? Just a thought.
I think you have alot of possibilities. Hopefully I was slightly helpful...
Let us know how you lesson comes along!