TableTots

Spinlight Studios has created some of the best educational apps for iOS. AlphaTots and TallyTots let kids work by themselves, but TABLETOTS brings parents more into the mix. This extraordinarily versatile app lets parents put together hundreds, if not thousands, of lessons in everything from letter and number recognition to spelling and math. The only real hiccup is there's no tutorial for putting those lessons together, which generally means some hunting and pecking before you know what to do. There are some good pre-set lessons, which are good starters, but some parents may get frustrated before finding them. There's also no way to save scenarios you've created -- a minor annoyance, but something that's worth correcting. 

The app won't know when a child gets an answer right or wrong, either, but there's no getting around that -- and it encourages parents to be actively involved with their children as they learn, something that's hard to complain about.