we have a subscription to the morestarfall.com - like 30 bucks for a year I think - personally, my kids like it (4 and 6) and I got it last year when they introduced it, I don't think I will be renewing it however. I would not consider it a 'curriculum' however. Maybe if you sat down with the kid and only let them do it in a specific order or something. I just think of it as a fairly non-commercial and 'safe' sigh - as in no ads to lead to other sites that I will let me kids do when they want to. If you actually want your kids to learn phonics I would suggest explode the code on-line, I have not used the site myself but have heard good things about it. We have used the books.