You’d be better off finding a tutor at a local college, community college, or church outreach . . . most areas in the US now have native Spanish speakers. I don’t think you’ll end up with more than a smattering of vocab with Rosetta Stone. We’ve tried it, and there wasn’t enough grammar or enough variety of learning to provide any conversational ability at all. My kids never did learn, until I taught them, the difference between ser and estar . . . and it really cuts conversations short if the only thing your kid can say is “The boy is under the airplane.” 🙂